Effect of High-Intensity Interval Training on Exercise Capacity, Blood Pressure, and Autonomic Responses in Patients With Hypertension: A Systematic Review and Meta-analysis.

CONTEXT: Despite the well-known positive effects of exercise in hypertensive patients, the best mode of exercise is still under discussion. OBJECTIVE: A systematic review of the literature, synthesizing data on the effects of high-intensity interval training (HIIT) on peak oxygen consumption (VO2 peak), blood pressure (BP), cardiac autonomic modulation, and resting heart rate (HR) in patients with hypertension. DATA SOURCES: MEDLINE (via PubMed), CENTRAL, PEDro database, and SciELO (from the earliest date available to December 31, 2020). STUDY SELECTION: Randomized controlled trials (RCTs) that evaluated the effects of HIIT in hypertensive patients. STUDY DESIGN: Systematic review and meta-analysis. LEVEL OF EVIDENCE: Level 2. DATA EXTRACTION: Mean differences (MDs) with a 95% CI were calculated, and heterogeneity was assessed using the I2 test. RESULTS: Nine RCTs encompassing 569 patients met the eligibility criteria and were included in the systematic review. Five trials compared supervised HIIT with moderate-intensity continuous training (MICT) and a control; 1 trial compared HIIT with MICT, and 3 compared HIIT with a control. In comparison with MICT, HIIT improved VO2 peak MD (3.3 mL.kg-1.min-1; 95% CI, 1.4-5.3; N = 130). In comparison with controls, HIIT improved VO2 peak MD (4.4 mL.kg-1.min-1; 95% CI, 2.5-6.2; N = 162). CONCLUSION: Despite the low quality of the evidence, HIIT is superior to MICT in improving VO2 peak in patients with hypertension. HIIT effectively improved VO2 peak, BP, and resting HR when compared with controls. HIIT appears to be safe only when performed in a supervised manner for stage 1 hypertension patients without associated risk factors.

Detraining period of the PILATES method on functional capacity of elderly women with type 2 diabetes: A randomized clinical trial.

INTRODUCTION: The aim of this study was to verify the effects of a 4-week detraining period on the functional capacity of elderly women with type-2 diabetes (T2D) after 12 weeks of a PILATES training program. METHODS: Twenty-two individuals with T2D were randomly allocated into two groups: CONTROL (n = 11; 67.5 ± 6.3 years; 154.7 ± 6.1 cm; 73.5 ± 6.1 kg; calorie intake: 1487.5 ± 360.6 kcal/day) and PILATES (n = 11; 65.5 ± 5.5 years; 155.0 ± 4.5 cm; 66.2 ± 5.4 kg; calorie intake: 1289.3 ± 385.0 kcal/day). The PILATES group participated at a 12-week PILATES program at moderate intensity, 3x/week with each session lasting 60-min. The functional capacity was evaluated in the baseline (PRE), after 12-weeks (POST) and 4-week detraining period (4W_DT). The general index of functional capacity (GIFC) was calculated for all participants. RESULTS: In the PILATES group there was a reduction in performance (increased test time) for the GIFC after 4W_DT in relation to POST (p < 0.05), however, GIFC showing maintenance of performance gain in relation to the PRE (p > 0.05) (PRE: 36.0 ± 5.5 s vs. POST: 27.2 ± 4.0 s vs. 4W_DT: 29.0 ± 4.2 s). The CONTROL group had worse performance than the GIFC POST (35.3 ± 4.6 s) and 4W_DT (35.4 ± 4.6 s) when compared to the PILATES group (F = 106.967; np2 = 0.842; p < 0.001). CONCLUSION: A period of 4W_DT was not able to reduce the functional gains of elderly women with T2D after 12 weeks of PILATES training. These results have a practical application for training professionals, enabling better control and planning of training interruptions on the PILATES method for elderly women with T2D.

Pilates training reduces blood pressure in older women with type 2 diabetes: A randomized controlled trial.

INTRODUCTION: The study investigated the effect of 12 weeks of pilates training on the hemodynamic responses of older women with type-2 diabetes (T2D). METHODS: 22 individuals with T2D were randomly allocated into two groups: CONTROL (n = 11; 67.5 ± 6.3 years; 154.7 ± 6.1 cm; 73.5 ± 6.1 kg; calorie intake: 1487.5 ± 360.6 kcal/day) and PILATES (n = 11; 65.5 ± 5.5 years; 155.0 ± 4.5 cm; 66.2 ± 5.4 kg; calorie intake: 1289.3 ± 385.0 kcal/day). The PILATES group executed a 12-week PILATES training program at moderate intensity, 3x/week with each session lasting 60-min. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and postprandial blood glucose were assessed at four timepoints: i) baseline; ii) 4th week; iii) 8th week; and iv) 12th week (s) of intervention. Two-way ANOVA for repeated measures and the Pearson's correlation coefficient were adopted. The alpha level was set at 0.05. RESULTS: A time∗group interaction effect was found for SBP (F = 4.206; η2 = 0.17; p = 0.02) and DBP (F = 2.624; η2 = 0.12; p = 0.05) with significant reductions (mmHg) in the 4ths and 8ths in the PILATES (PILATES SBP baseline: 134.9 ± 27.6; 4ths: 112.4 ± 15.7; 8ths: 115.8 ± 18.3; 12ths: 124.3 ± 19.1 vs. CONTROL SBP baseline: 126.5 ± 15.7; 4ths: 126.3 ± 16.2; 8ths: 124.5 ± 13.1; 12ths: 126.3 ± 21.4 | PILATES DBP baseline: 72.9 ± 11.3; 4ths: 65.1 ± 12.2; 8ths: 65.8 ± 12.2; 12ths: 67.6 ± 7.5 vs. CONTROL DBP baseline: 74.6 ± 12.0; 4ths: 73.9 ± 11.5; 8ths: 75.3 ± 11.9; 12ths: 74.5 ± 9.2). CONCLUSION: Four and eight weeks of PILATES training promotes reduction in the SBP and DBP of older women with T2D. The exercises performed in this study were mainly body weight exercises and required a few auxiliary materials, which turns this method of training accessible.

Mulheres brasileiras que praticam com maior frequência o treinamento resistido apresentam menores escores de ansiedade e depressão / Brazilian women who practice resistance training more frequently present lower anxiety and depression scores

O objetivo deste estudo foi verificar a associação entre o treinamento resistido (TR) e variáveis relacionadas com escores de ansiedade e depressão em mulheres brasileiras. Participaram do estudo 154 mulheres praticantes de TR (40,9±8,6 anos; 61,7±9,9 kg; 160,0±5,0 cm) e 113 mulheres não praticantes de exercício físico (Controle) (39,0±8,0 anos; 64,2±11,2 kg; 160,0±6,0 cm). As participantes responderam à Hospital Anxiety and Depression Scale e questões sociodemográficas relacionadas ao exercício físico. Diferenças estatísticas ocorreram entre os grupos em relação à ansiedade (TR: 0,75±0,48 vs. Controle: 1,07±0,57; P<0,001) e depressão (TR: 0,84±0,34 vs. Controle: 1,02±0,40; P<0,001). A frequência semanal de TR foi preditora de ansiedade [ß=-0,165; F(1,138)=6,39; P=0,05] e depressão [ß=-0,213; F(1,138)=6,46; P=0,01]. Conclui-se que mulheres brasileiras que praticam TR apresentam menores escores de ansiedade e depressão quando comparadas à não praticantes de exercício físico. Além disso, maior frequência semanal de TR prediz menores escores de ansiedade e depressão nesta população.

The aim was to verify the association between resistance training (RT) and related variables with anxiety and depression scores in Brazilian women. One hundred and fifty-four women practitioners of RT (40.9±8.6 years; 61.7±9.9 kg; 160.0±5.0 cm) and 113 non-practitioners (Control) participated in the study. Participants answered the Hospital Anxiety and Depression Scale and sociodemographic questions related to physical exercise. Statistical differences between groups occurred for anxiety (RT: 0.75±0.48 vs. Control: 1.07±0.57; P<0.001) and depression (RT: 0.84±0.34 vs. Control: 1.02±0.40; P<0.001). Weekly RT frequency significantly predicted anxiety [ß=-0.165; F(1.138)=6.39; P=0.05] and depression [ß=-0.213; F(1.138)=6.46; P=0.01]. We concluded that Brazilian women who practice RT presented lower anxiety and depression scores when compared to non-practitioners. In addition, a higher weekly frequency of RT predicted lower depression and anxiety scores in this population.

Perceptual Responses and Future Exercise Intentions of Individuals With Systemic Arterial Hypertension.

To analyze the perceptual responses and future intentions (FI) to engage in continuous moderate aerobic exercise (CE) and high-intensity interval exercise (HIIE) of individuals with systemic arterial hypertension (SAH), we had 25 participants with SAH (M age = 48.0, SD = 8.0 years) perform, on different days and in randomized order, 33 minute sessions of CE and 30 minutes of HIIE. Twenty seconds after each 3-minutes of these sessions, we obtained participant responses to Ratings of Perceived Exertion (RPE), the Feeling Scale (FS), the Felt Arousal Scale (FAS), and attentional focus (AF). We assessed their FI to engage in CE and HIIE at the end of each session. We analyzed results using two-way ANOVAs with repeated measures, Spearman correlation coefficients, a simple linear regression, and Wilcoxon test. We found a significant time by session type (CE and HIIE) interaction effect for RPE (p < .001), FAS (p = .002), and AF (p = .004). Participants' FI to engage in HIIE were only significantly correlated with FAS (r = -.424; p = .035) and AF (r = .431; p = .032) responses. FAS responses (ßz = -.455; R2 = .207; p = .022) and AF responses (ßz = .467; R2 = .218; p = .019) predicted FI for engaging in HIIE. There were no significant differences in participants' FI to engage in CE sessions (M = 76.4, SD =22.5%) versus HIIE sessions (M = 71.8, SD = 22.9%; p = .177). Individuals with SAH had more positive perceptions of CE than HIIE, as seen by their greater dissociative AF in the CE sessions. Furthermore, these results supported the application of strategies aimed at manipulating AF in this population, possibly as a tool to increase participants' FI to engage in subsequent physical exercise.

Anaerobic Threshold Determination in Cycle Ergometer From Rating of Perceived Exertion.

ABSTRACT: Santos, GAd, Numata-Filho, ES, Rosa, TdS, Passos Neves, RV, Simões, HG, and Moreira, SR. Anaerobic threshold determination in cycle ergometer from rating of perceived exertion. J Strength Cond Res 36(5): 1277-1281, 2022-The objective of the study was to investigate the validity of the rating of perceived exertion threshold (TRPE) for anaerobic threshold (AT) estimation during an incremental test (IT) on a cycle ergometer. Nineteen physically active and healthy men performed an IT on a cycle ergometer. The intensity corresponding to the AT was considered as the point immediately before the abrupt increase in blood lactate concentration ([La]) in the IT. TRPE was determined in the last intensity corresponding to perceptual response previous the 15 arbitrary units (AU) in the 15-point RPE scale. The heart rate (HR), [La], and RPE were obtained at the end of each stage of the IT. There was no significant difference between workload obtained from the AT (150 [120-150] watts) and TRPE (150 [120-150] watts) (p > 0.05). In addition, there were no differences between HR (AT, 139.5 ± 12.7 b·min-1 vs. TRPE, 141.9 ± 14.6 b·min-1, p > 0.05) and [La] (AT, 3.1 [2.8-3.2] mM vs. TRPE, 3.1 [2.9-3.7] mM, p > 0.05). There was a strong correlation between the intensities in AT and TRPE during the IT (r = 0.88). A substantial reliability (intraclass correlation coefficient = 0.84 [0.64-0.94 confidence interval 95%]) was evidenced, as well as a substantial agreement between the AT and TRPE intensities (Pc = 0.84), as confirmed by the Bland-Altman plot (-4.7 [-34.2/24.7]). TRPE was a predictor of the AT (ß = 1.146, R = 0.770, SEE = 15.070, p < 0.01). It can be concluded that TRPE is valid for AT estimation during an IT on a cycle ergometer.

Respostas agudas da glicose sanguínea no segundo dia da recuperação do exercício resistido de moderada vs. alta intensidade em mulheres com diabetes tipo 2 / Acute blood glucose responses on the second day of recovery from moderate vs. high intensity resistance exercise in women with type 2 diabetes

O exercício resistido (ER) pode reduzir a glicose no sangue em pessoas com diabetes tipo 2 (DM2). No entanto, é necessária maior clareza quanto à intensidade do ER e ao tempo necessário para essa resposta aguda. Portanto, o objetivo deste estudo foi comparar as respostas agudas de glicose no sangue no segundo dia de recuperação do ER moderada versus de alta intensidade em mulheres com DM2. Doze mulheres com DM2 (55,2 ± 4,0 anos; 70,1 ± 11,4 kg; e 155,7 ± 3,3 cm) realizaram duas sessões experimentais com sete dias de intervalo em ordem aleatória. Para a sessão 1: ER40% do teste de uma repetição máxima (1RM) e sessão 2: ER80%1RM, com 16 e 8 repetições para cada série, respectivamente, em 7 exercícios com 3 circuitos durante 40min. A glicemia foi monitorada por 35h (primeiro dia: 24h e segundo dia: 11h) a cada 5 minutos após cada sessão experimental pelo Sistema de Monitoramento Contínuo de Glicose (modelo Guardian REAL-Time). O teste t de Student não mostrou diferença significativa na glicemia do segundo dia (11h) após as sessões de ER40%1RM vs. RE80%1RM [respectivamente, 161,3 ± 62,3 mg.dL-1 vs. 157,2 ± 41,9 mg.dL-1; t (11) = 0,259; p = 0,800]. A ANOVA two-way para medidas repetidas mostrou que as respostas de glicose no sangue a cada hora durante a recuperação no segundo dia não mostraram diferenças significativas entre as sessões de ER [F (1,731; 19,039) = 0,688; p = 0,734]. Concluímos que as respostas glicêmicas agudas no segundo dia da recuperação do ER de intensidade moderada e alta não diferiram entre as mulheres com DM2.

Resistance exercise (RE) can lower blood glucose in people with type 2 diabetes (T2D). However, greater clarity is needed regarding the RE intensity and time required for this acute response. Therefore, the aim of this study was to compare acute blood glucose responses on the second day of recovery from moderate vs. high-intensity RE in women with T2D. Twelve women with T2D (55.2 ± 4.0 years; 70.1 ± 11.4 kg; and 155.7 ± 3.3 cm) performed two experimental sessions seven days apart in a randomized order. For session 1: RE40% of one-repetition maximum test (1RM) and session 2: RE80%1RM, with 16 and 8 repetitions for each set, respectively, in 7 exercises with 3 circuits during 40min. Blood glucose was monitored for over 35h (first day: 24h and second day: 11h) every 5 minutes after each experimental session by the Continuous Glucose Monitoring System (Guardian REAL-Time model). Student's t-test showed no significant difference in blood glucose on the second day (11h) after RE40%1RM vs. RE80%1RM sessions [respectively, 161.3 ± 62.3 mg.dL-1 vs. 157.2 ± 41.9 mg.dL-1; t (11) = 0.259; p = 0.800]. Two-way ANOVA for repeated measures showed that blood glucose responses every hour during recovery on the second day showed no significant differences between RE sessions [F (1.731, 19.039) = 0.688; p = 0.734]. We concluded that the acute blood glucose responses on the second day of moderate and high intensity RE did not differ among women with T2D.

Effects of isometric handgrip training on blood pressure among hypertensive patients seen within public primary healthcare: a randomized controlled trial

ABSTRACT BACKGROUND: Meta-analyses have demonstrated that isometric handgrip training (IHT) decreases blood pressure in hypertensive individuals. Nonetheless, most studies were conducted in laboratory settings and its effects in real-world settings remain unclear. OBJECTIVE: To analyze the effects of IHT on office and ambulatory blood pressure in hypertensive patients attended within primary healthcare. DESIGN AND SETTING: Randomized controlled trial conducted in primary healthcare units within the Family Health Program, Petrolina, Pernambuco, Brazil. METHODS: 63 hypertensive patients (30-79 years old; 70% female) were randomly allocated into IHT or control groups. IHT was performed three times per week (4 x 2 minutes at 30% of maximal voluntary contraction, one-minute rest between bouts, alternating the hands). Before and after the 12-week training period, office and ambulatory blood pressure and heart rate variability were obtained. The significance level was set at P < 0.05 (two-tailed testing) for all analyses. RESULTS: IHT significantly decreased office systolic blood pressure (IHT: 129 ± 4 versus 121 ± 3 mmHg, P < 0.05; control: 126 ± 4 versus 126 ± 3 mmHg, P > 0.05), whereas there was no effect on diastolic blood pressure (IHT: 83 ± 3 versus 79 ± 2 mmHg, P > 0.05; control: 81 ± 3 versus 77 ± 3 mmHg, P > 0.05). Heart rate variability and ambulatory blood pressure were not altered by the interventions (P > 0.05 for all). CONCLUSION: IHT reduced office systolic blood pressure in hypertensive patients attended within primary care. However, there were effects regarding diastolic blood pressure, ambulatory blood pressure or heart rate variability. CLINICALTRIALS.GOV IDENTIFIER: NCT03216317.

Effects of isometric handgrip training on blood pressure among hypertensive patients seen within public primary healthcare: a randomized controlled trial.

BACKGROUND: Meta-analyses have demonstrated that isometric handgrip training (IHT) decreases blood pressure in hypertensive individuals. Nonetheless, most studies were conducted in laboratory settings and its effects in real-world settings remain unclear. OBJECTIVE: To analyze the effects of IHT on office and ambulatory blood pressure in hypertensive patients attended within primary healthcare. DESIGN AND SETTING: Randomized controlled trial conducted in primary healthcare units within the Family Health Program, Petrolina, Pernambuco, Brazil. METHODS: 63 hypertensive patients (30-79 years old; 70% female) were randomly allocated into IHT or control groups. IHT was performed three times per week (4 x 2 minutes at 30% of maximal voluntary contraction, one-minute rest between bouts, alternating the hands). Before and after the 12-week training period, office and ambulatory blood pressure and heart rate variability were obtained. The significance level was set at P < 0.05 (two-tailed testing) for all analyses. RESULTS: IHT significantly decreased office systolic blood pressure (IHT: 129 ± 4 versus 121 ± 3 mmHg, P < 0.05; control: 126 ± 4 versus 126 ± 3 mmHg, P > 0.05), whereas there was no effect on diastolic blood pressure (IHT: 83 ± 3 versus 79 ± 2 mmHg, P > 0.05; control: 81 ± 3 versus 77 ± 3 mmHg, P > 0.05). Heart rate variability and ambulatory blood pressure were not altered by the interventions (P > 0.05 for all). CONCLUSION: IHT reduced office systolic blood pressure in hypertensive patients attended within primary care. However, there were effects regarding diastolic blood pressure, ambulatory blood pressure or heart rate variability. CLINICALTRIALS.GOV IDENTIFIER: NCT03216317.

Anthropometric profile and functional performance of capoeira competitors in the world games / Perfil antropométrico y desempeño funcional de los competidores de capoeira en los juegos mundiales

SUMMARY: This study aimed to characterize the anthropometric profile and functional performance of elite competitors in different categories in the world championship of the ABADÁ-Capoeira School. Fifty high level male athletes were divided according to their weight categories, being: light category (VIOLA: ≤ 76.9 kg; n = 15); intermediate category (MEDIO: > 77.0 kg until ≤ 85.9 kg; n = 25) and heavy category (GUNGA: ≥ 86.0 kg; n = 10). Two evaluation batteries were performed: 1) anthropometry and somatotype determination; 2) physical performance in tests of push-up, sit-up, sit-and-reach, quadrant jump test, squat jump (SJ), and counter movement jump (CMJ). The "endo-mesomorph" classification predominated in the three categories. There was a difference in the quadrant jump test between VIOLA and GUNGA subgroups (F[2.47] = 4.299; p = 0.019). Endomorphism had a negative correlation (p < 0.01) with the performance in the sit-up (r = -0.51), push-up (r = -0.39), SJ (r = -0.45), and CMJ (r = -0.49). Male elite competitors at the international level, regardless the weight category, have a predominance of the mesomorphic component of the somatotype. Moreover, all capoeira athletes were classified as excellent for the sit-and-reach, sit-up, and push-up, and the latter were positively correlated with mesomorphism. However, endomorphism was inversely associated with the sit-up, push-up, SJ, and CMJ. In this way, the present study assists coaches in the formulation of appropriate training programs aiming the development of an ideal physical composition, which will be associated with high-level performance in capoeira.

RESUMEN: Este estudio tuvo como objetivo caracterizar el perfil antropométrico y el desempeño funcional de los competidores de élite en diferentes categorías en el campeonato mundial de la Escuela de Capoeira ABADÁ. Cincuenta deportistas masculinos de alto nivel se dividieron según sus categorías de peso: categoría ligera (VIOLA: ≤ 76,9 kg; n = 15); categoría intermedia (MEDIO: > 77,0 kg hasta ≤ 85,9 kg; n = 25) y categoría pesada (GUNGA: ≥ 86,0 kg; n = 10). Se realizaron dos baterías de evaluación: 1) antropometría y determinación del somatotipo; 2) rendimiento físico en pruebas de flexiones, abdominales, sentadillas y estiramientos, prueba de salto en cuadrante, salto en cuclillas y salto con contramovimiento. La clasificación "endo-mesomorfo" predominó en las tres categorías. Hubo una diferencia en la prueba de salto de cuadrante entre los subgrupos VIOLA y GUNGA (F [2,47] = 4,299; p = 0,019). El endomorfismo tuvo una correlación negativa (p <0.01) con el desempeño en los abdominales (r = - 0,51), lagartijas (r = -0,39), SJ (r = -0,45) y CMJ (r = - 0,49). Los competidores de élite masculinos a nivel internacional, indepen- dientemente de la categoría de peso, tienen predominio del componente mesomórfico del somatotipo. Además, todos los atletas de capoeira fueron clasificados como excelentes para sit-and-reach, sit-up y push-up, y estos últimos se correlacionaron positivamente con el MESO. Sin embargo, el ENDO se asoció inversamente con los abdominales, lagartijas, SJ y CMJ. De esta manera, el presente estudio ayuda a los entrenadores en la formulación de programas de entrenamiento adecuados que apunten al desarrollo de una composición física ideal, que estará asociada con un rendimiento de alto nivel en la capoeira.

Óleo essencial de eucalipto e resposta cardiovascular em idosos após sessão aguda de exercício isométrico / Essential oil of eucalyptus and cardiovascular responses in elderly after acute isometric exercise session

O objetivo do trabalho foi investigar o efeito agudo do óleo essencial de eucalipto (OEE) nas respostas cardiovasculares de repouso e após sessão de exercício resistido isométrico (ERI). Vinte idosos, após serem submetidos a sessões experimentais com inalação de OEE ou condição controle, permaneceram em recuperação durante 60 min (Rec-60') para depois realizaram três séries de 1 min (1 min de recuperação entre séries) no ERI, para membro superior dominante em aparelho de preensão manual, com intensidade de 30% da contração voluntária máxima (ERI-30%). Intervalos R-R (iRR) e medidas no domínio da frequência (low frequency ­ LF e high frequency ­ HF) além da pressão arterial (PA), frequência cardíaca (FC) e duplo produto (DP) foram avaliados. Não ocorreram diferenças (p>0,05) quando comparadas as sessões (OEE vs.controle) na Rec-60' e ERI-30%. Diferenças foram encontradas no fator tempo do repouso para Rec-60' nas variáveis FC e iRR e do repouso para ERI-30% na PA sistólica, PA diastólica e DP. A inalação do OEE não proporcionou alterações significativas nas respostas cardiovasculares e autonômicas de idosos no repouso e após sessão de ERI-30%.

The aim was to investigate the acute effect of eucalyptus essential oil (EEO) in cardiovascular responses of rest and after isometric resistance exercise (IRE). Twenty elderly individuals, after being submitted to experimental sessions with inhalation of EEO or control condition, remained in recovery for 60 min (Rec-60') and then performed three sets of 1 min (1 min recovery between sets) in IRE, for dominant upper limb in handgrip, with intensity of 30% of maximum voluntary contraction (IRE-30%). R-R intervals (RRi) and measurements in the frequency domain (low frequency ­ LF and high frequency ­ HF) in addition to blood pressure (BP), heart rate (HR) and rate product pressure (RPP) were evaluated. There were no differences (p>0.05) when comparing the sessions (EEO vs.control) in Rec-60' and IRE-30%. Differences were found in the time factor of rest to Rec-60' in HR and RRi variables and of rest to IRE-30% in systolic BP, diastolic BP and RPP. Inhalation of EEO did not provided significant changes in cardiovascular and autonomic responses on rest and after IRE-30% in elderly individuals.

Concurrent validity of instruments for measuring speed of movement in leg press exercises / Validade concorrente de instrumentos para medir a velocidade de movimento em exercíos de leg press / Validez concurrente de los instrumentos para medir la velocidad de movimiento en los exercicio de leg press

ABSTRACT Introduction Adequate measurement of movement velocity in strength exercises can assist in the prescription and evaluation of training effects. Objective The objectives of the present study were to analyze the reliability (test-retest) and concurrent validity of the movement velocity measured by means of the electrogoniometer and accelerometer during horizontal leg press exercise at different intensities (40, 60, 80% of a maximum repetition - 1RM). Methods Eighteen young women attended the laboratory on five occasions. After determining the maximum dynamic force, two visits (separated by 48-72 hours) were used to verify the reliability (test-retest) for different speed variables in the three intensities. Results The mean propulsive velocity obtained by the goniometer showed higher Intraclass correlation coefficients (ICC) and lower coefficients of variation compared to the accelerometer. The same behavior was observed for both the mean velocity and the peak velocity. The propulsive time was more reproducible and with less variation for the accelerometer and bad CCI for both sensors were observed at 60% of 1RM. When the sensors are compared, the mean and average propulsive velocities presented moderate ratios with a large to very large standardized medium bias. Conclusion The potentiometer of the electrogoniometer can be used to estimate the velocity in the horizontal leg press exercise, especially for loads of 60 and 80%. The performance of the accelerometer was inferior to that of the potentiometer. Level of evidence II; Diagnostic studies.

RESUMO Introdução A adequada mensuração da velocidade de movimento nos exercícios de força muscular pode auxiliar na prescrição e avaliação dos efeitos do treinamento. Objetivo Os objetivos do presente estudo foram analisar a confiabilidade (teste-reteste) e validade concorrente da velocidade de movimento mensurada por meio do eletrogoniômetro e acelerômetro durante exercício leg press horizontal em diferentes intensidades (40, 60, 80% de uma repetição máxima - 1RM). Métodos Dezoito mulheres jovens compareceram ao laboratório em cinco ocasiões. Após determinação da força dinâmica máxima, duas visitas (separadas por 48-72 horas) foram destinadas a verificação da confiabilidade (teste-reteste) para diferentes variáveis de velocidade nas três intensidades. Resultados A velocidade média propulsiva obtida pelo goniômetro apresentou maiores coeficientes de correlação Intraclasse (CCI) e menores coeficientes de variação em comparação ao acelerômetro. O mesmo comportamento foi verificado tanto para a velocidade média quanto a pico. O tempo propulsivo foi mais reprodutível e com menor variação para o acelerômetro e CCI ruins para ambos os sensores foram observados em 60% de 1RM. Quando os sensores são comparados, a velocidade média e média propulsiva apresentaram relações moderadas com viés médio padronizado grande a muito grande. Conclusão O potenciômetro do eletrogoniômetro pode ser utilizado para estimar a velocidade no exercício leg press horizontal, em especial, para cargas de 60 e 80%. O desempenho do acelerômetro se mostrou inferior ao do potenciômetro. Nível de evidência II; Estudos diagnósticos.

RESUMEN Introducción La medición adecuada de la velocidad de movimiento en los ejercicios de fuerza muscular puede ayudar en la prescripción y evaluación de los efectos del entrenamiento. Objetivo Los objetivos del presente estudio fueron analizar la confiabilidad (test-retest) y la validez concurrente de la velocidad de movimiento medida por medio del electrogoniómetro y acelerómetro durante ejercicio leg press horizontal en diferentes intensidades (40, 60, 80% de una repetición máxima - ١RM). Métodos Dieciocho mujeres jóvenes asistieron al laboratorio en cinco ocasiones. Después de la determinación de la fuerza dinámica máxima, dos visitas (separadas por 48-72 horas) fueron destinadas a verificación de la confiabilidad (test-reteste) para diferentes variables de velocidad en las tres intensidades. Resultados La velocidad media propulsiva obtenida por el goniómetro presentó mayores coeficientes de correlación Intraclasse (CCI) y menores coeficientes de variación en comparación al acelerómetro. El mismo comportamiento se verificó tanto para la velocidad media como la pico. El tiempo propulsivo fue más reproducible y con menor variación para el acelerómetro y CCI malos para ambos sensores se observó en un 60% de 1RM. Cuando los sensores son comparados, la velocidad media y media propulsiva presentaron relaciones moderadas con sesgo medio estandarizado grande a muy grande. Conclusión El potenciómetro del electrogoniómetro puede ser utilizado para estimar la velocidad en el ejercicio leg press horizontal, en especial, para cargas de 60 y 80%. El rendimiento del acelerómetro se mostró inferior al del potenciómetro. Nivel de evidencia II; Estudios dianósticos.

Sociodemographic determinants associated with physical activity level of quilombolas in the Brazilian state of Bahia: 2016 survey. / Determinantes sociodemográficos associados ao nível de atividade física de quilombolas baianos, inquérito de 2016.

Objective to analyze sociodemographic variables associated with insufficient physical activity level in Bahian quilombolas. Methods this was a cross-sectional study with data on sociodemographic characteristics and level of physical activity using a standardized form, administered through interviews with a representative sample of adults living in quilombos in the geographical region of Bahia; crude and adjusted logistic regression was used. Results 850 participants were included whose average age was 45.0+17.0 years; 61.2% were female; prevalence of physical inactivity was 21.9% (95%CI 19.1; 24.7); insufficient physical activity level among adult quilombolas was higher among the elderly (OR 2.12; 95%CI 1.29; 3.49) and individuals who did not work (OR 1.47; 95%CI 1.01; 2, 14). Conclusion being elderly and not working is associated with insufficient physical activity in quilombolas.

Faster and Healthier: Relationship between Telomere and Performance in Master Athletes.

Aging is associated with increased oxidative stress, chronic inflammation, and decreased telomere length (TL). However, the lifestyle of master athletes can lead to a reduced risk of these conditions, and thus attenuates aging and performance deterioration. We aimed to analyze the relationships between TL and relative performance (RP), and their relation to adiposity, oxidative stress, and inflammation in endurance (END) and sprint/power (SPW) master athletes (MAs). Twenty-two world-class MAs visited the laboratory for anamnesis, anthropometrics, and blood sampling. Inflammatory and oxidative stress parameters were assessed using commercial kits. Relative TL was determined in leukocytes through qPCR analyses. A positive association was observed between RP and TL in both groups (SPW: r=0.641; END: r=0.685) and the whole sample (r=0.594). The IL6/IL10 ratio presented an inverse correlation with RP in the whole sample (r=-0.580). Body mass index also demonstrated a negative correlation with TL for the END group (r=-0.690) and the whole sample analysis (r=-0.455). Moreover, the IL6/IL10 ratio was negatively associated with strength/power training hours (r=-0.464), whereas the CAT/TBARS ratio was negatively associated with aerobic training hours (r=-0.482). In conclusion, TL of MAs was associated with RP regardless of the training model (endurance or sprint/power), and inflammation and adiposity were associated with shorter telomeres.

Pilates Method Training: Functional and Blood Glucose Responses of Older Women With Type 2 Diabetes.

Melo, KCB, Araújo, FdS, Cordeiro Júnior, CCM, de Andrade, KTP, and Moreira, SR. Pilates method training: Functional and blood glucose responses of older women with type 2 diabetes. J Strength Cond Res 34(4): 1001-1007, 2020-The objective of this study was to investigate the effect of 12 weeks of the Pilates method on the functional capacity (FC) and glycemic control of older women with type 2 diabetes (T2D). Twenty-two women with T2D were randomized into control (CONTROL: 67.5 ± 6.3 years; 154.7 ± 6.1 cm; 73.5 ± 6.1 kg) and Pilates (PILATES: 65.5 ± 5.5 years; 155.0 ± 4.5 cm; 66.2 ± 5.4 kg) groups, which held sessions of 60 minutes at a frequency of 3 times per week during 12 weeks. Blood glucose was measured before and after sessions in PILATES, as well as in moments of pre, rest, 4, 8, and 12 weeks of the PILATES and CONTROL interventions. The glycated hemoglobin (HbA1c) level before and after 12 weeks of the intervention was evaluated. The general index of the FC (GIFC) was obtained through a battery of tests for older patients with T2D. Analysis of variance detected differences in the GIFC for PILATES vs. CONTROL, respectively, in 4 weeks (30.3 ± 4.6 vs. 34.8 ± 4.9 seconds; p < 0.05), 8 weeks (29.2 ± 4.5 vs. 34.6 ± 4.9 seconds; p < 0.05), and 12 weeks (27.2 ± 4.0 vs. 35.3 ± 4.6 seconds; p < 0.05). PILATES presented a difference in postprandial glycemia pre- vs. 4 and 12 weeks (246.1 ± 58.5 vs. 219.9 ± 59.9 and 207.6 ± 49.1 mg·dl, respectively; p < 0.05), as well as in HbA1c pre- vs. 12 weeks (7.8 ± 1.0 vs. 6.7 ± 0.6%, respectively; p < 0.05). Differences in postprandial glycemia (p < 0.05) were found in PILATES before vs. after sessions, respectively, of 1st-12th (217.1 ± 49.1 vs. 157.9 ± 55.7 mg·dl), 13th-24th (204.5 ± 44.7 vs. 146.3 ± 44.5 mg·dl), and 25th-36th (214.3 ± 40.4 vs. 152.7 ± 52.0 mg·dl). A correlation between postprandial glycemia and GIFC after 12 weeks was detected (r = 0.37; p = 0.04). It is concluded that 12 weeks of the Pilates method induces improvement and relationship in the FC and glycemic control in older women with T2D.

Determinantes sociodemográficos associados ao nível de atividade física de quilombolas baianos, inquérito de 2016* / Determinantes sociodemográficos asociados al nivel de actividad física de quilombolas (habitantes de comunidades negras) de Bahia, Brasil, encuesta del 2016 / Sociodemographic determinants associated with physical activity level of quilombolas in the Brazilian state of Bahia: 2016 survey

Objetivo: analisar as variáveis sociodemográficas associadas ao nível de atividade física (NAF) insuficiente em quilombolas baianos. Métodos: estudo transversal com dados obtidos por meio de formulário padronizado, com características sociodemográficas e o NAF, aplicado como entrevista em amostra representativa de adultos residentes em quilombos de região geográfica baiana; empregou-se regressão logística bruta e ajustada. Resultados: foram incluídos 850 participantes, com idade média de 45,0+17,0 anos; 61,2% do sexo feminino; a prevalência de inatividade física foi 21,9% (IC95%19,1;24,7); o nível insuficiente de AF entre os adultos quilombolas foi maior entre idosos (OR 2,12; IC95%1,29; 3,49) e indivíduos que não trabalhavam (OR 1,47; IC95%1,01; 2,14). Conclusão: ser idoso e não trabalhar se associa com NAF insuficiente em quilombolas.

Objetivos: analizar las variables sociodemográficas asociadas con un nivel de actividad física (NAF) insuficiente en quilombolas bahianos. Métodos: estudio transversal con datos obtenidos a través de formulario estandarizado, con características sociodemográficas y NAF, aplicado como entrevista en una muestra representativa de adultos que viven en quilombos en la región geográfica de Bahía. Se utilizó la regresión logística bruta y ajustada. Resultados se incluyeron 850 participantes, con una edad promedio de 45,0 + 17,0 años; el 61,2% era de mujeres. La prevalencia de inactividad física fue del 21,9% (IC95%19,1; 24,7). El nivel insuficiente de AF entre los adultos quilombolas fue mayor entre los ancianos (OR 2.12; IC95%1.29; 3.49) y las personas que no trabajaban (OR 1.47; IC95%1.01; 2, 14). Conclusión: ser anciano y no trabajar se asocia con un nivel de actividad física insuficiente en quilombolas.

Objective: to analyze sociodemographic variables associated with insufficient physical activity level in Bahian quilombolas. Methods: this was a cross-sectional study with data on sociodemographic characteristics and level of physical activity using a standardized form, administered through interviews with a representative sample of adults living in quilombos in the geographical region of Bahia; crude and adjusted logistic regression was used. Results: 850 participants were included whose average age was 45.0+17.0 years; 61.2% were female; prevalence of physical inactivity was 21.9% (95%CI 19.1; 24.7); insufficient physical activity level among adult quilombolas was higher among the elderly (OR 2.12; 95%CI 1.29; 3.49) and individuals who did not work (OR 1.47; 95%CI 1.01; 2, 14). Conclusion: being elderly and not working is associated with insufficient physical activity in quilombolas.

Resposta aguda do exercício resistido dinâmico e isométrico em variáveis hemodinâmicas e autonômicas cardíacas em homens adultos / Respuesta aguda del ejercicio resistido dinámico y isométrico en variables hemodinámicas y autonómicas cardíacas en hombres adultos / Acute response to dynamic and isometric resistance exercise in hemodynamic and autonomic cardiac variables in male adults

Objetivo: Comparar respostas hemodinâmicas e autonômicas cardíacas após sessões agudas de exercício resistido dinâmico e isométrico. Método: Após familiarização às sessões experimentais e teste de uma repetição máxima, 12 homens (idade: 49.0±6.4 anos) sem o uso de medicamentos e experiência em exercício resistido foram randomizados de forma cruzada à duas sessões experimentais de exercício resistido dinâmico e isométrico compostos por um circuito de seis exercícios alternados por segmento corporal e à uma intensidade de 60% de uma repetição máxima. Aos momentos de repouso e recuperação foram mensuradas a pressão arterial sistólica e diastólica e registrado os intervalos R-R com posterior cálculo de índices da variabilidade da frequência cardíaca. Resultados: Não foram observadas diferenças estatisticamente significantes nas respostas pressóricas entre as sessões experimentais. O duplo produto se recuperou para valores basais aos 25min da recuperação em ambas as sessões. A frequência cardíaca permaneceu mais elevada durante momentos da recuperação na sessão dinâmico, ao passo que a sessão isométrica recuperou menos batimentos cardíacos para essa mesma variável. Adicionalmente, o balanço simpato-vagal permaneceu elevado e indicadores parassimpáticos diminuídos, em relação ao repouso, após sessão isométrica. Conclusão: Não ocorreram diferenças nas respostas hemodinâmicas entre as sessões de exercício resistido. Por outro lado, demonstrou-se diferentes recuperações para a frequência cardíaca e variáveis autonômicas após as sessões experimentais

Objetivo: Comparar respuestas hemodinámicas y autonómicas cardíacas después de sesiones agudas de ejercicio resistido dinámico y isométrico. Método: Después de familiarización en las sesiones experimentales y prueba de una repetición máxima, 12 hombres (edad: 49.0±6.4 años) sin el uso de medicamentos y experiencia en ejercicio resistido fueron randomizados de forma cruzada a dos sesiones experimentales de ejercicio resistido dinámico y isométricos compuestos por un circuito de seis ejercicios alternados por segmento corporal con una intensidad del 60% de una repetición máxima. Durante los momentos de reposo y recuperación se midieron la presión arterial sistólica y diastólica y se registraron los intervalos R-R con posterior cálculo de índices de la variabilidad de la frecuencia cardíaca. Resultados: No se observaron diferencias estadísticamente significativas en las respuestas de presión arterial entre las sesiones experimentales. El doble producto se recuperó a valores basales a los 25min de la recuperación en ambas sesiones. La frecuencia cardiaca permaneció más elevada durante momentos de recuperación en la sesión dinámica, mientras que la sesión isométrica recuperó menos latidos cardíacos para esa misma variable. Todavía, el balance simpático-vagal permaneció elevado e indicadores parasimpáticos disminuidos, en relación al reposo, después de la sesión isométrica. Conclusión: No ocurrieron diferencias en las respuestas hemodinámicas entre las sesiones de ejercicio. Sin embargo, se demostró diferentes recuperaciones entre las variables autonómicas después de las sesiones experimentales

Objective: To compare hemodynamic and cardiac autonomic responses after acute sessions of dynamic and isometric resistance exercise. Methods: After familiarization with the experimental sessions and maximal repetition test, 12 men (age: 49.0±6.4 years) without medication and experience in resistance exercise were cross-randomized in two experimental sessions of dynamic and isometric resistance exercise composed by a circuit with six alternating exercises per body segment and at intensities of 60% of a one maximum repetition. At rest and recovery moments, systolic and diastolic blood pressure were measured and R-R intervals were recorded with subsequent calculation of heart rate variability indexes. Results: No statistically significant differences were observed in blood pressure responses between experimental sessions. The rate pressure product recovered to baseline at 25min of recovery in both sessions. The heart rate remained higher during moments of recovery in the dynamic session, while the isometric session recovered fewer heart beats for that same variable. In addition, the sympatho-vagal balance remained high and the parasympathetic indicators decreased in relation to rest after the isometric session. Conclusion: There were no differences in hemodynamic response between resistance exercise sessions. Otherwise, different recoveries between the autonomic variables after the experimental sessions were demonstrated

Empathy and autonomic and hemodynamic cardiac responses / Empatia e Respostas Hemodinâmicas e Autonômicas Cardíacas

Abstract Hemodynamic and autonomic responses have been used as sensitive indicators of cardiovascular health in situations involving emotions. However, few studies evaluated these indicators when feelings result from vicarious experiences. This research aimed to verify if empathy measures would be associated with variations in blood pressure, heart rate, rate pressure product, and heart rate variability in young adults, after exposure to experimental situations. Results point out that hemodynamic and autonomic cardiac indicators were associated with dispositional and situational empathy. These results are discussed based on Martin Hoffman's theory and in the light of recent findings in the field of Psychophysiology.

Resumo Respostas hemodinâmicas e autonômicas têm sido utilizadas como indicadores sensíveis da saúde cardiovascular durante situações de cunho emocional. Todavia, ainda são escassos os trabalhos que avaliam esses indicadores quando os sentimentos produzidos ocorrem a partir de experiências vicárias. O presente estudo objetivou verificar se medidas de empatia estariam associadas a variações nos indicadores de pressão arterial, frequência cardíaca, duplo produto e variabilidade da frequência cardíaca em jovens adultos, após sua exposição a situações-estímulo. Os resultados indicam que indicadores hemodinâmicos e autonômicos cardíacos estiveram associados a componentes da empatia situacional e da empatia constitucional. Estes resultados são discutidos com base na teoria de Martin Hoffman e a partir de achados recentes no campo da Psicofisiologia.

Exercício físico e comprimento dos telômeros: uma revisão sistemática nas disfunções crônico-degenerativas / Physical exercise and telomere length: a systematic review in chronic-degenerative dysfunctions

Introdução: Os telômeros estão localizados nas extremidades dos cromossomos e constituem-se de sequências do DNA e proteínas associadas. O exercício físico parece ter relação com um maior comprimento de telômeros, porém, pouco se sabe sobre o impacto deste na dinâmica telomérica de pessoas com disfunções crônico-degenerativas. Objetivo: Revisar sistematicamente a literatura a respeito do efeito do exercício no comprimento dos telômeros em pessoas com disfunções crônico-degenerativas. Métodos: Foram realizadas buscas por dois investigadores independentes nas bases de dados Pubmed, Scopus, Lilacs e Cochrane Controlled Trials Database, analisando publicações nos idiomas inglês e português. Resultados: Foram encontrados 845 estudos, onde destes, quatro atenderam aos critérios de elegibilidade e seguiram para síntese. Conclusão: Embora o encurtamento dos telômeros esteja relacionado ao estilo de vida, herança genética e doenças do envelhecimento, ainda não está claro se o exercício físico pode atenuar tal processo de encurtamento de forma significativa em indivíduos com disfunções crônico-degenerativas, como excesso de peso e diabetes.

Introduction: Telomeres are located at the ends of chromosomes and consist of DNA sequences and associated proteins. Physical exercise seems to be related to a greater telomeres length, but little is known about its impact on the telomere dynamics of people with chronic degenerative dysfunctions. Purpose: Systematically review the literature on the effect of exercise on the telomeres length in people with chronic degenerative disorders. Methods: Searches were carried out by two independent researchers in the databases Pubmed, Scopus, Lilacs e Cochrane Controlled Trials Database, analyzing publications in the English and Portuguese language. Results: A total of 845 studies were found, of which four met the eligibility criteria and followed up for synthesis. Conclusion: Although shortening of telomeres is related to lifestyle, genetic inheritance, and diseases of aging, still unclear physical exercise can attenuate such a shortening process significantly in individuals with chronic-degenerative dysfunctions such as overweight and diabetes.

O frequencímetro Polar® RS800CX é sensível à manobra de alteração postural / The Polar® RS800CX frequencymeter is sensitive to the postural maneuver

Objetivo: Verificar a sensibilidade do frequencímetro Polar® RS800CX na variação postural a partir da frequência cardíaca (FC) e parâmetros da variabilidade da FC (VFC). Método: Homens jovens (n=20) saudáveis tiveram registradas as medidas de FC e dos intervalos R-R da VFC (RRi) nos domínios do tempo (RRi, RMSSD, pNN50) e da frequência (LF, HF e LF.HF-1) utilizando o Polar® RS800CX. Resultados: Diferenças (p<0,05) foram encontradas para Posição Supina (PS) 5' e PS10' vs. Posição Ortostática (PO) 5' e PO10' para FC (61,1±1,1 e 61,0±1,3 bpm vs. 79,5±3,9 e 80,8±3,5 bpm), RRi (990,0±19,9 e 994,5±23,2 ms vs. 787,4±34,0 e 768,6±30,1 ms), rMSSD (70,5±8,4 e 71,1±8,5 ms vs. 32,2±3,4 e 30,7±3,7 ms), pNN50 (41,1±6,0 e 46,3±5,3% vs. 15,4±2,5 e 14,3±2,6%), LF (52,3±6,4 e 55,4±6,5 n.u. vs. 82,0±4,2 e 80,7±4,8 n.u.), HF (47,7±6,4 e 44,6±6,5 n.u. vs. 18,0±4,2 e 19,3±4,8 n.u.) e LF.HF-1 (2,9±0,8 e 3,1±0,8 vs. 14,1±2,9 e 14,3±3,1). Conclusão: O frequencímetro Polar® RS800CX se apresentou sensível a variações na postura corporal.

Purpose: To determine the sensitivity of the frequency meter Polar® RS800CX in postural maneuver from the heart rate (HR) and HR variability (HRV) parameters. Method: Young (n=20) healthy men had registered HR and RR intervals (RRi) measurements in the time domain (RRi, RMSSD, pNN50) and frequency (LF, HF and LF.HF-1) using the Polar® RS800CX. Results: Differences were found to supine position (SUP) 5 'and SUP10' vs. standing position (STP) 5 'and STP10' in HR (61.1 ± 1.1 and 61.0 ± 1.3 bpm vs. 79.5 ± 3.9 and 80.8 ± 3.5 bpm), RRi (990.0 ± 19.9 and 994.5 ± 23,2 ms vs. 787.4 ± 34.0 ms and 768.6 ± 30.1 ms), rMSSD (70.5 ± 8.4 and 71.1 ± 8.5 ms vs. 32.2 ± 3.4 and 30.7 ± 3.7 ms), pNN50 (41.1 ± 6 0 and 46.3 ± 5.3% vs. 15.4 ± 2.5 and 14.3 ± 2.6%), LF (52.3 ± 6.4 and 55.4 ± 6.5 n.u. vs. 82.0 ± 4.2 and 80.7 ± 4.8 n.u), HF (47.7 ± 6.4 and 44.6 ± 6.5 n.u. vs. 18.0 ± 4.2 and 19.3 ± 4.8 n.u.) and LF.HF-1 (2.9 ± 0.8 and 3.1 ± 0.8 vs. 14.1 ± 2.9 and 14.3 ± 3.1). Conclusion: The frequency meter RS800CX Polar® appeared sensitive to variations in body posture.