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1.
Int J Sports Med ; 41(1): 12-20, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31747702

RESUMO

In view of the growing amount of (intense) training in competitive sports, quick recovery plays a superior role in performance restoration. The aim of the present study was to compare the effects of active versus passive recovery during high-intensity interval training (HIIT) and sprint interval training (SIT) protocols on acute alterations of circulating blood cells. Twelve male triathletes/cyclists performed 1) a HIIT consisting of 4×4 min intervals, 2) a SIT consisting of 4×30s intervals, separated by either active or passive recovery. Blood samples were collected immediately before and at 0', 30', 60' and 180' (minutes) post-exercise. Outcomes comprised leukocytes, lymphocytes, neutrophils, mixed cell count, platelets, cellular inflammation markers (neutrophil/lymphocyte-ratio (NLR), platelet/lymphocyte-ratio (PLR)), and the systemic immune-inflammation index (SII). In view of HIIT, passive recovery attenuated the changes in lymphocytes and neutrophils compared to active recovery. In view of SIT, active recovery attenuated the increase in leukocytes, lymphocytes and absolute mixed cell count compared to passive recovery. Both protocols, independent of recovery, significantly increased NLR, PLR and SII up to 3h of recovery compared to pre-exercise values. The mode of recovery influences short-term alterations in the circulating fraction of leukocytes, lymphocytes, neutrophils and the mixed cell count, which might be associated with different hormonal and metabolic stress responses due to the mode of recovery.


Assuntos
Contagem de Células Sanguíneas , Treinamento Intervalado de Alta Intensidade/métodos , Homeostase/fisiologia , Inflamação/sangue , Esforço Físico/fisiologia , Adulto , Biomarcadores/sangue , Contagem de Eritrócitos , Humanos , Contagem de Leucócitos , Contagem de Linfócitos , Masculino , Neutrófilos/metabolismo , Contagem de Plaquetas , Adulto Jovem
2.
J Sports Sci ; 38(2): 121-129, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31661663

RESUMO

A common barrier to exercise is "lack of time". Accordingly, interest in low-volume, high-intensity training has grown exponentially since this activity is considered time-efficient. However, the high-intensity nature of this exercise may frequently result in feelings of displeasure creating another barrier for many people. The purpose of this study was to compare affective (pleasure-displeasure) responses to three low-volume, high-intensity exercise conditions, including a novel shortened-sprint protocol. Using a within-subjects, randomised crossover experiment, healthy participants (N = 36) undertook a single bout of: 1) traditional reduced-exertion, high-intensity interval training (TREHIT), 2) a novel, shortened-sprint REHIT (SSREHIT) protocol, and 3) sprint continuous training (SCT). Affect and perceived efforts were recorded throughout exercise using the Feeling Scale (FS) and the 15-point Borg Rating of Perceived Exertion (RPE) scale, respectively. Enjoyment was recorded 5 min post-exercise using the Exercise Enjoyment Scale (EES). Differences were found for FS (condition by time interaction: P = 0.01GG, η2 = 0.26), RPE (P = 0.01GG, η2 = 0.23), and enjoyment (P < 0.01) with all outcomes favouring SSREHIT. Shortened-sprint protocols may diminish feelings of displeasure and might be a time-efficient yet tolerable exercise choice to help motivate some people to increase their physical activity and fitness.


Assuntos
Treinamento Intervalado de Alta Intensidade/métodos , Treinamento Intervalado de Alta Intensidade/psicologia , Prazer , Adulto , Estudos Cross-Over , Feminino , Humanos , Masculino , Motivação , Percepção/fisiologia , Esforço Físico/fisiologia , Adulto Jovem
4.
Braz J Med Biol Res ; 52(12): e9169, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31826183

RESUMO

We investigated the effect of caffeine ingestion combined with a 2-wk sprint interval training (SIT) on training-induced reductions in body adiposity. Twenty physically-active men ingested either 5 mg/kg of cellulose as a placebo (PLA, n=10) or 5 mg/kg of caffeine (CAF, n=10) 60 min before each SIT session (13×30 s sprint/15 s of rest). Body mass and skinfold thickness were measured pre- and post-training. Energy expenditure was measured at rest, during exercise, and 45 min after exercise in the first SIT session. Body fat was similar between PLA and CAF groups at pre-training (P>0.05). However, there was a significant decrease in body fat after training in the CAF group (-5.9±4.2%, P<0.05) but not in PLA (1.5±8.0%, P>0.05). There was no difference in energy expenditure at rest and during exercise between PLA and CAF groups (P>0.05), but the post-exercise energy expenditure was 18.3±21.4% greater in the CAF than in the PLA group (P<0.05). In conclusion, caffeine ingestion before SIT sessions induced a body fat loss that may be associated with higher post-exercise energy expenditure.


Assuntos
Tecido Adiposo/efeitos dos fármacos , Cafeína/administração & dosagem , Metabolismo Energético/efeitos dos fármacos , Treinamento Intervalado de Alta Intensidade , Consumo de Oxigênio/efeitos dos fármacos , Adulto , Método Duplo-Cego , Humanos , Masculino , Adulto Jovem
5.
J Sports Med Phys Fitness ; 59(9): 1435-1441, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31610637

RESUMO

BACKGROUND: This study investigated the effects of coffee ingestion with supplemental caffeine (CAF) on serum testosterone (T) responses to exercise in recreationally strength-trained males. METHODS: Subjects ingested 6 mg/kg body weight of caffeine via 12 ounces of coffee (CAF) supplemented with anhydrous caffeine or decaffeinated (DEC) coffee prior to exercise in a randomized, within-subject, crossover design. The exercise session consisted of 21 minutes of high-intensity interval cycling (alternating intensities at power outputs associated with 2.0 mmol/L lactate for two minutes and 4.0 mmol/L lactate for one minute) followed by resistance exercise (seven exercises, three sets of ten repetitions, 65% 1RM, one-minute rest periods). Subjects also completed repetitions to fatigue tests and soreness scales to determine muscle recovery 24 hours following the exercise. RESULTS: T was elevated immediately and 30-minutes post-exercise by 20.5% and 14.3% respectively (P<0.05). There was no main effect for treatment and no exercise x treatment interaction. There were no differences in repetitions to fatigue or soreness between treatments (P>0.05). No relationships were observed between T and any proxy of recovery. CONCLUSIONS: While past literature suggests caffeine may enhance T post-exercise, data from the current study suggest that augmented T response is not evident following anhydrous caffeine added to coffee. The duration of T elevation indicates that this protocol is beneficial to creating long-lasting increases in serum testosterone.


Assuntos
Cafeína/metabolismo , Treinamento Intervalado de Alta Intensidade/métodos , Treinamento de Resistência/métodos , Testosterona/sangue , Adulto , Cafeína/administração & dosagem , Café , Estudos Cross-Over , Humanos , Ácido Láctico/sangue , Masculino , Adulto Jovem
6.
Top Spinal Cord Inj Rehabil ; 25(3): 248-259, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31548792

RESUMO

Background: Recent studies in nondisabled individuals have demonstrated that low-volume high-intensity interval training (HIIT) can improve cardiometabolic health similar to moderate-intensity training (MIT) despite requiring 20% of the overall time commitment. To date, there have been no studies assessing the effects of HIIT for improving cardiometabolic health in individuals with SCI. Objectives: The primary purpose of this pilot study was to compare the effects of 6 weeks of low-volume HIIT vs MIT using arm crank ergometer exercise to improve body composition, cardiovascular fitness, glucose tolerance, blood lipids, and blood pressure in a cohort of individuals with longstanding SCI. Methods: Participants were randomized to 6 weeks of HIIT or MIT arm crank exercise training. Aerobic capacity, muscular strength, blood lipids, glucose tolerance, blood pressure, and body composition were assessed at baseline and 6 weeks post training. Results: Seven individuals (6 male, 1 female; n = 3 in MIT and n = 4 in HIIT; mean age 51.3 ± 10.5 years) with longstanding SCI completed the study. The preliminary findings from this pilot study demonstrated that individuals with SCI randomized to either 6 weeks of HIIT or MIT displayed improvements in (a) insulin sensitivity, (b) cardiovascular fitness, and (c) muscular strength (p < .05). However, MIT led to greater improvements in arm fat percent and chest press strength compared to HIIT (p < .05). Conclusion: No differences between MIT and HIIT were observed. Both conditions led to improvements in insulin sensitivity, aerobic capacity, muscle strength, and blood lipids in individuals with SCI. Future larger cohort studies are needed to determine if the shorter amount of time required from HIIT is preferable to current MIT exercise recommendations.


Assuntos
Aptidão Cardiorrespiratória , Treinamento Intervalado de Alta Intensidade/métodos , Traumatismos da Medula Espinal/fisiopatologia , Traumatismos da Medula Espinal/reabilitação , Adulto , Pressão Sanguínea , Composição Corporal , Colesterol/fisiologia , Feminino , Teste de Tolerância a Glucose , Humanos , Resistência à Insulina , Masculino , Pessoa de Meia-Idade , Força Muscular , Consumo de Oxigênio , Projetos Piloto
7.
Mayo Clin Proc ; 94(9): 1718-1730, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31486378

RESUMO

OBJECTIVE: To examine the effect of high-intensity interval training (HIIT) on body fat mass and distribution in patients with myocardial infarction (MI) who underwent cardiac rehabilitation (CR). PATIENTS AND METHODS: We retrospectively screened 391 consecutive patients with MI enrolled in CR between September 1, 2015, and February 28, 2018. We included 120 patients who completed 36 CR sessions and underwent pretest-posttest dual-energy x-ray absorptiometry; 90 engaged in HIIT, and 30 engaged in moderate-intensity continuous training (MICT). High-intensity interval training included 4 to 8 alternating intervals of high- (30-60 seconds at a rating of perceived exertion [RPE] of 15-17 [Borg scale range, 6-20]) and low-intensity (1-5 minutes at RPE <14), and MICT performed for 20 to 45 minutes of exercise at an RPE of 12 to 14. Body weight, fat mass, and lean mass were measured via dual-energy x-ray absorptiometry with lipid profile measured via clinical procedures. RESULTS: The HIIT and MICT groups were similar in age (67 vs 67 years), sex (26.7% [24 of 90 patients in the HIIT group] vs 26.7% [8 of 30 in the MICT group), and body mass index (30.3 vs 29.5 kg/m2) at baseline. The HIIT group had greater reductions in body fat percentage (P<.001), fat mass (P<.001), abdominal fat percentage (P<.001), waist circumference (P=.01), total cholesterol (P=.002), low-density lipoprotein cholesterol (P<.001), and triglycerides (P=.006). Improvements in total body mass and body mass index were not different across groups. After matching exercise duration, exercise intensity, and energy expenditure, HIIT-induced improvements in total fat mass (P=.02), body fat percentage (P=.01), and abdominal fat percentage (P=.02) persisted. CONCLUSION: Our data suggest that supervised HIIT results in significant reductions in total fat mass (P<.001) and abdominal fat percentage (P<.001) and improved lipid profile in patients with MI who undergo CR.


Assuntos
Índice de Massa Corporal , Tolerância ao Exercício/fisiologia , Treinamento Intervalado de Alta Intensidade/métodos , Infarto do Miocárdio/reabilitação , Consumo de Oxigênio , Adulto , Idoso , Estudos de Coortes , Feminino , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/mortalidade , Prognóstico , Estudos Retrospectivos , Medição de Risco , Estatísticas não Paramétricas , Análise de Sobrevida , Resultado do Tratamento
8.
Int J Sports Med ; 40(12): 756-761, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31476782

RESUMO

We studied the effects of supramaximal interval exercise (SIE) with or without antihypertensive medication (AHM) on 21-hr blood pressure (BP) response. Twelve hypertensive patients chronically medicated with AHM, underwent three trials in a randomized order: a) control trial without exercise and substituting their AHM with a placebo (PLAC); b) placebo medicine and a morning bout of SIE (PLAC+SIE), and c) combining AHM and exercise (AHM+SIE). Acute and ambulatory blood pressure responses were measured for 21-hr after treatment. 20 min after treatment, systolic blood pressure (SBP) readings were reduced, similar to readings after PLAC+SIE (-9.7±6.0 mmHg, P<0.001) and AHM+SIE (-10.4±7.9 mmHg, P=0.001). 21 h after treatment, SBP remained reduced after PLAC+SIE (125±12 mmHg, P=0.022) and AHM+SIE (122±12 mmHg, P=0.013) compared to PLAC (132±16 mmHg). The BP reduction in PLAC+SIE faded out at 4 a.m., while in AHM+SIE it continued overnight. At night, BP reduction was larger in AHM+SIE than PLAC+SIE (-5.6±4.0 mmHg, P=0.006). Our data shows that a bout of supramaximal aerobic interval exercise in combination with ARB medication in the morning elicits a sustained blood pressure reduction lasting at least 21-h. Thus, the combination of exercise and angiotensin receptor blocker medication seems superior to exercise alone for acutely decreasing blood pressure.


Assuntos
Anti-Hipertensivos/uso terapêutico , Treinamento Intervalado de Alta Intensidade , Hipertensão/tratamento farmacológico , Hipertensão/fisiopatologia , Hipotensão Pós-Exercício/fisiopatologia , Actigrafia/métodos , Idoso , Pressão Sanguínea/fisiologia , Estudos Cross-Over , Método Duplo-Cego , Feminino , Monitores de Aptidão Física , Frequência Cardíaca/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Postura/fisiologia , Estudos de Tempo e Movimento
9.
Mayo Clin Proc ; 94(12): 2415-2426, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31477320

RESUMO

OBJECTIVE: To examine the effects of interval walking training (IWT) on the estimated peak aerobic capacity (eV˙O2peak) and lifestyle-related disease (LSD) score while focusing on exercise intensity and volume in middle-aged and older people. PARTICIPANTS AND METHODS: Men and women (N=679; mean age, 65±7 SD years) completed 5-month IWT. Participants were instructed to repeat 5 or more sets of fast and slow walking for 3 minutes each at 70% or more and 40% eV˙O2peak for walking, respectively, per day for 4 or more d/wk. This study was conducted from April 1, 2005, through February 29, 2008. RESULTS: Interval walking training increased eV˙O2peak by 14% and decreased LSD score by 17% on average (P<.001). During 5-month IWT, fast and slow walking times were 88±65 SD and 100±86 min/wk, respectively, but varied among participants. We divided participants into approximately 10 bins for 6 minutes each of fast and slow walking times per week up to 60 min/wk, and above this time, approximately 8 bins for 30 or 60 minutes each of fast and slow walking up to the maximal time. We found that both eV˙O2peak and LSD score improved as fast walking time per week increased up to 50 min/wk (R2=0.94; P<.001 for eV˙O2peak; R2=0.51; P=.03 for LSDS) but plateaued above this time. In contrast, improvement in neither eV˙O2peak nor LSDS was positively correlated with slow or total walking time per week. Multiple regression analyses confirmed that fast walking time per week was the major determinant of improvements in eV˙O2peak (P<.001) and LSD score (P=.001). CONCLUSION: High-intensity walking time during IWT is a key factor to increase eV˙O2peak and decrease LSD score in middle-aged and older people.


Assuntos
Diabetes Mellitus/epidemiologia , Dislipidemias/epidemiologia , Tolerância ao Exercício/fisiologia , Treinamento Intervalado de Alta Intensidade , Hipertensão/epidemiologia , Aptidão Física/fisiologia , Idoso , Diabetes Mellitus/fisiopatologia , Dislipidemias/fisiopatologia , Feminino , Humanos , Hipertensão/fisiopatologia , Incidência , Estilo de Vida , Masculino , Pessoa de Meia-Idade , Caminhada/fisiologia
10.
J Cancer Res Clin Oncol ; 145(10): 2583-2593, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31401675

RESUMO

OBJECTIVE: Exercise training is recently considered as a trend in adjuvant therapies for cancer patients, but its mechanisms need to be scrutinized further. This study is aimed to test the hypothesis that the patients who perform the high-intensity interval exercise training (HIIT) during hormone therapy would show improvements in low-grade inflammation and HSP70 compared to the controls receiving standard care. METHODS: Fifty two non-metastatic and hormone-responsive breast cancer patients were randomly assigned to high-intensity interval exercise (HIIT) (n = 26) and usual care (n = 26) groups. The HIIT groups participated in a high-intensity interval training protocol on a treadmill 3 days/week for 12 weeks. The training intensity was determined according to the predicted maximal heart rate. Demographic characteristics and medical history were collected via an interviewer-administered questionnaire at the baseline visit. Body fat was estimated based on skinfold thickness measured with calipers on the participant's nonsurgery side at the triceps, suprailiac crest. [Formula: see text] was estimated by 1-Mile Rockport Walk Test. Blood samples were collected 48 h before starting the exercise protocol and 48 h after the last exercise session. TNF-α, IL-6, IL-1ß, IL-10, and HSP70 levels in serum were measured using the enzyme-linked immunosorbent assay (ELISA) method according to the manufacture's instruction. Supernatant cytokine concentrations were determined by ELISA for IL-4 and IFN-γ. The data were analyzed by ANCOVA test that the pretest values were considered as covariate at P ≤ 0.05. RESULTS: HIIT improved [Formula: see text] in the HIIT group compared to the usual care group (P = 0.002). The serum levels of TNF-α (P = 0.001), IL-6 (P = 0.007), and IL-10 (P = 0.001) were lower in the HIIT group. The level of IL-4 (P = 0.050) in the stimulated peripheral blood mononuclear cells significantly increased in the HIIT group compared to the usual care group. Furthermore, the serum level of the HSP70 was significantly higher in the HIIT group in comparison to the usual care group (P = 0.050). The TNF-α/IL-10 (P = 0.050) and IL-6/IL-10 (P = 0.042) ratios were lower in the HIIT group. CONCLUSION: The results of this study indicated that HIIT has positive impacts on the cardiorespiratory fitness and inflammatory cytokines in the breast cancer patients undergoing hormone therapy.


Assuntos
Neoplasias da Mama/etiologia , Neoplasias da Mama/metabolismo , Proteínas de Choque Térmico HSP70/metabolismo , Treinamento Intervalado de Alta Intensidade , Inflamação/complicações , Inflamação/metabolismo , Biomarcadores , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/terapia , Citocinas/metabolismo , Feminino , Proteínas de Choque Térmico HSP70/genética , Treinamento Intervalado de Alta Intensidade/métodos , Humanos , Inflamação/patologia , Mediadores da Inflamação/metabolismo , Leucócitos Mononucleares/imunologia , Leucócitos Mononucleares/metabolismo
11.
Med Sci Sports Exerc ; 51(9): 1876-1883, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31415443

RESUMO

PURPOSE: Continuous and interval are the two types of aerobic exercise training commonly used for health promotion. We sought to determine which aerobic exercise training program results in larger health improvements in metabolic syndrome (MetS) individuals. METHODS: One hundred twenty-one MetS patients (age, 57 ± 8 yr; weight, 92 ± 15 kg; and MetS factors, 3.8 ± 0.8 components) with low initial cardiorespiratory fitness (CRF) (V˙O2peak, 24.0 ± 5.5 mL·kg·min) were randomized to undergo one of the following 16-wk exercise program: (a) 4 × 4-min high-intensity interval training at 90% of HRMAX (4HIIT group; n = 32), (b) 50-min moderate-intensity continuous training at 70% of HRMAX (MICT group; n = 35), (c) 10 × 1-min HIIT at 100% of HRMAX (1HIIT group; n = 32), or (d) no exercise control group (CONT; n = 22). We measured the evolution of all five MetS components (i.e., MetS Z Score) and CRF (assessed by V˙O2peak) before and after intervention. RESULTS: MetS Z score decreased 41% after 4HIIT (95% confidence interval [CI], 0.25-0.06; P < 0.01) and 52% in MICT (95% CI, 0.24-0.06; P < 0.01), whereas it did not change in 1HIIT (decreased 24%; 95% CI, -0.16 to 0.03; P = 0.21) and CONT (increased 20%; 95% CI, -0.19 to 0.04; P = 0.22). However, the three exercise groups improved similarly their V˙O2peak (4HIIT, 11%; 95% CI, 0.14-0.33; MICT, 12%; 95% CI, 0.18-0.36; and 1HIIT, 14%; 95% CI, 0.21-0.40 L·min; all P < 0.001). CONCLUSIONS: Our findings suggest that in sedentary individuals with MetS and low initial CRF level any aerobic training program of 16 wk with a frequency of three times per week is sufficient stimulus to raise CRF. However, the more intense but shorter 1HIIT training program is not effective on improving MetS Z score, and thus we caution its recommendation for health promotion purposes in this population.


Assuntos
Aptidão Cardiorrespiratória/fisiologia , Terapia por Exercício/métodos , Síndrome Metabólica/fisiopatologia , Síndrome Metabólica/terapia , Idoso , Peso Corporal/fisiologia , Metabolismo Energético/fisiologia , Feminino , Treinamento Intervalado de Alta Intensidade , Humanos , Masculino , Pessoa de Meia-Idade , Consumo de Oxigênio/fisiologia , Comportamento Sedentário
12.
Oxid Med Cell Longev ; 2019: 1965364, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31396298

RESUMO

Background and Aim: Exercise is an effective strategy to reduce obesity-induced oxidative stress. The purpose of this study was to compare the effects of two training modalities (moderate-intensity continuous training (MICT) and high-intensity interval training (HIIT)) on the pro/antioxidant status of different tissues in obese Zucker rats. Methods: Eight-week-old male Zucker rats (fa/fa, n = 36) were subdivided in three groups: MICT, HIIT, and control (no exercise) groups. Trained animals ran on a treadmill (0° slope), 5 days/week for 10 weeks (MICT: 51 min at 12 m·min-1; HIIT: 6 sets of 3 min at 10 m·min-1 followed by 4 min at 18 m·min-1). Epididymal (visceral) and subcutaneous adipose tissue, gastrocnemius muscle, and plasma samples were collected to measure oxidative stress markers (advanced oxidation protein products (AOPP), oxidized low-density lipoprotein (oxLDL)), antioxidant system markers (ferric-reducing ability of plasma (FRAP), superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx) activities), and prooxidant enzymes (NADPH oxidase and xanthine oxidase (XO) activities, myeloperoxidase content). Results: Compared with the control, MICT increased GPx and catalase activities and the FRAP level in epididymal adipose tissue. HIIT increased the AOPP level in subcutaneous adipose tissue. In the muscle, HIIT increased both SOD and GPx activities and reduced the AOPP level, whereas MICT increased only SOD activity. Finally, plasma myeloperoxidase content was similarly decreased by both training modalities, whereas oxLDL was reduced only in the MICT group. Conclusion: Both HIIT and MICT improved the pro/antioxidant status. However, HIIT was more efficient than MICT in the skeletal muscle, whereas MICT was more efficient in epididymal adipose tissue. This suggests that oxidative stress responses to HIIT and MICT are tissue-specific. This could result in ROS generation via different pathways in these tissues. From a practical point of view, the two training modalities should be combined to obtain a global response in people with obesity.


Assuntos
Tecido Adiposo/metabolismo , Músculo Esquelético/metabolismo , Estresse Oxidativo , Condicionamento Físico Animal , Animais , Antioxidantes/metabolismo , Glutationa Peroxidase/metabolismo , Treinamento Intervalado de Alta Intensidade , Lipoproteínas LDL/sangue , Masculino , Malondialdeído/sangue , NADPH Oxidases/metabolismo , Obesidade/metabolismo , Obesidade/patologia , Oxidantes/metabolismo , Ratos , Ratos Zucker , Superóxido Dismutase/metabolismo
13.
J Rehabil Med ; 51(9): 712-718, 2019 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-31468059

RESUMO

BACKGROUND: The outcome of surgery in deconditioned patients can be improved through prehabilitation. This study examined the effect of prehabilitation in patients diagnosed with lung cancer. METHODS: Candidates for lung cancer resection were assigned to high-intensity interval training (n = 74) or usual care (n = 77). Cardiopulmonary exercise testing and 6-min walk test were performed before and after training. High-intensity interval training consisted of 2-3-weekly, 2 × 10-min series of cycling at peak power, measured with cardiopulmonary exercise testing prior to training, with a 15-s on-off duty cycle, preceded by a 5-min warm-up and followed by a 5-min cool-down. Work-rate, heart-rate, saturation, dyspnoea and leg effort were monitored. RESULTS: Waiting time (median 25 days) allowed a median of 8 high-intensity interval training sessions to be performed. Adherence to mean high-intensity interval training was 87% (18% standard deviation; SD). High-intensity interval training power increased (23 watt, 95% confidence interval (95% CI): 20-26 watt), as did heart rate (14 bpm, 95% CI 11-16 bpm). Resting heart rate (-6 bpm, 95% CI -4 to -7 bpm) and heart rate 1 min post-cool-down decreased (-5 bpm, 95% CI -4 to -7 bpm). Aerobic capacity increased after high-intensity interval training (14%, 95% CI 3-26%), as did peak power output (median 7%, 95% CI 2-13%), but not after usual care. Six-min walk test score increased after high-intensity interval training (median 20%, 95% CI 14-26%), but not after usual care. CONCLUSION: Short-term high-intensity interval training is feasible in deconditioned patients and increases cardio-respiratory fitness and walking capacity.


Assuntos
Teste de Esforço/métodos , Exercício/fisiologia , Treinamento Intervalado de Alta Intensidade/métodos , Neoplasias Pulmonares/reabilitação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
15.
Int J Sports Med ; 40(10): 639-644, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31378863

RESUMO

This study investigated the effects induced by 8 weeks of two high-intensity interval training (HIIT) protocols, 10-20-30 and 30-30 concepts, characterized by significantly different training volume and intensity, on physiological parameters, running performance, body composition and psychophysiological stress of recreational divided into two groups: the 10-20-30 group performed two 10-20-30 sessions/wk and one continuous training (CT)/wk, whilst the 30-30 group performed two 30-30 sessions/wk and one CT session/wk. VO2max, 1 km time, maximal aerobic speed (MAS), and body composition were evaluated before and after intervention. Internal load was measured through rating of perceived exertion (RPE). Both groups significantly improved running performance (1 km time: p=0.04; MAS: p=0.000001), aerobic fitness (VO2max: p=0.000002) and body composition (lean mass (kg) p=0.0001; fat mass (%) p=0.00005). RPE resulted significantly lower in the 10-20-30 group than in 30-30 group (10-20-30: 13.36±0.28; 30-30:15.55±0.21; p=0.0002). Thus, the 10-20-30 group improved physiological parameters, performance and body composition, similar to 30-30 with significantly lower RPE values. These results suggest that in recreational runners the 10-20-30 training is effective in improving aerobic fitness and performance, with a lower subjective perception of effort, thus enhancing individual compliance and adherence to the prescribed training program.


Assuntos
Composição Corporal , Treinamento Intervalado de Alta Intensidade/métodos , Corrida/fisiologia , Adulto , Desempenho Atlético , Humanos , Masculino , Consumo de Oxigênio , Carga de Trabalho
16.
BMC Complement Altern Med ; 19(1): 234, 2019 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-31464643

RESUMO

BACKGROUND: The neurobiology of persistent pain shares common underlying psychobiology with that of traumatic stress. Modern treatments for traumatic stress often involve bottom-up sensorimotor retraining/exposure therapies, where breath, movement, balance and mindfulness, are used to target underlying psychobiology. Vigorous exercise, in particular Bikram yoga, combines many of these sensorimotor/exposure therapeutic features. However, there is very little research investigating the feasibility and efficacy of such treatments for targeting the underlying psychobiology of persistent pain. METHODS: This study was a randomized controlled trail (RCT) comparing the efficacy of Bikram yoga versus high intensity interval training (HIIT), for improving persistent pain in women aged 20 to 50 years. The participants were 1:1 randomized to attend their assigned intervention, 3 times per week, for 8 weeks. The primary outcome measure was the Brief Pain Inventory (BPI) and further pain related biopsychosocial secondary outcomes, including SF-36 Medical Outcomes and heart rate variability (HRV), were also explored. Data was collected pre (t0) and post (t1) intervention via an online questionnaire and physiological testing. RESULTS: A total of 34 women were recruited from the community. Analyses using ANCOVA demonstrated no significant difference in BPI (severity plus interference) scores between the Bikram yoga (n = 17) and the HIIT (n = 15). Women in the Bikram yoga group demonstrated significantly improved SF-36 subscale physical functioning: [ANCOVA: F(1, 29) = 6.17, p = .019, partial eta-squared effect size (ηp2) = .175 and mental health: F(1, 29) = 9.09, p = .005, ηp2 = .239; and increased heart rate variability (SDNN): F(1, 29) = 5.12, p = .013, ηp2 = .150, scores compared to the HIIT group. Across both groups, pain was shown to decrease, no injuries were experienced and retention rates were 94% for Bikram yoga and 75% for HIIT . CONCLUSIONS: Bikram yoga does not appear a superior exercise compared to HIIT for persistent pain. However, imporvements in quality of life measures and indicator of better health were seen in the Bikram yoga group. The outcomes of the present study suggest vigorous exercise interventions in persistent pain cohorts are feasible. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry ( ACTRN12617001507370 , 26/10/2017).


Assuntos
Dor Crônica , Terapia por Exercício , Treinamento Intervalado de Alta Intensidade , Ferimentos e Lesões/complicações , Ioga , Adulto , Dor Crônica/etiologia , Dor Crônica/terapia , Estudos de Viabilidade , Feminino , Humanos , Pessoa de Meia-Idade , Projetos Piloto , Adulto Jovem
17.
Diabetes Metab Syndr ; 13(2): 1359-1364, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31336492

RESUMO

PURPOSE: To compare the acute and chronic effects of high-intensity intermittent training (HIIT) and moderate-intensity continuous training (MICT) on indices of cardio-metabolic health: (HDL-c, total cholesterol, triglycerides, heart ratio, and phase angle/PhA) in physically active men. METHODS: Twenty active men were randomly allocated to HIIT (n = 10), or MICT (n = 10) for 5 weeks, three times per week. HIIT consisted of running 5 km with 1-min at 100% of maximal aerobic speed interspersed by 1-min passive recovery while subjects in MICT group ran continuously the same 5 km at 70% of maximal aerobic speed. Blood samples were collected at different moments during the first and last exercise session. Before and after 5 weeks of both exercise training protocols, heart ratio (during exercise session) and PhA were measured pre and post-exercise training. RESULTS: Fasting HDL-c levels did not change after 5 weeks of HIIT or MICT. Perceptual variation of HDL pre and post training (fed state) tended to differ between HIIT and MICT (p = 0.09). All lipoproteins parameters (HDL-c, total cholesterol, triglycerides and non-HDL) were increased in post-acute exercise session compared to pre-exercise during the first and last training session, these being observed after both training protocols. PhA and heart rate measured at different times during the first and last training session were not affected in both training protocols. CONCLUSION: These results indicate that HIIT and MICT modify the post-exercise lipoprotein profile acutely. On the other hand, only HIIT tended to increase HDL-c levels chronically.


Assuntos
Doenças Cardiovasculares/prevenção & controle , Exercício , Treinamento Intervalado de Alta Intensidade/métodos , Síndrome Metabólica/prevenção & controle , Adulto , Biomarcadores/análise , Seguimentos , Frequência Cardíaca , Humanos , Masculino , Prognóstico , Fatores de Tempo
18.
Clin Ter ; 170(4): e235-e240, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31304507

RESUMO

PURPOSE: Hypokinesia is the fourth cause of endemic death in the world. The prevalence of obesity, caused by hypokinesia, in the world continues to increase and it is the main risk factor of chronic diseases. Our aim was to evaluate the effectiveness of curves program and High-Intensity Interval Training (HIIT) in healthy women. METHODS: The study design is a non-randomized clinical trial. Eighty women with age between 30 to 40 years (who train 3/4 times a week) participated over a period of six months. They were allocated into a "Curves" program group (n = 40) and a "High-Intensity Interval Training" group (n = 40). BMI, body fat, the fat mass percentage was calculated by OMRON body fat 306 TM at baseline and the end of the intervention. RESULTS: the results between high-intensity interval training and curves show that curves scores were significantly lower among Interval training. after 6 months the most impact was on "Abdomen loss "in Curves Group Mean(SD) = -4.48(1.70). According to the multivariate analysis, we can say that for all the dependent variables Weight loss -0.320 (<0.001), Trunk loss -0.376 (<0.001), Abdomen loss -0.276 (<0.001), Hip loss -0.302 (<0.001), Lower arm loss -0.248 (0.003) and Fat mass loss -0.153 (0.061) the curves group shows significant results in comparison with the high-intensity interval training group (p <0.001) while the civil status is significantly associated with only "Upper arm loss" variable (ß = -0.357; p <0.001). CONCLUSIONS: This "Curves" program improved strength muscles, loss of fat and fat mass reduction more than High Intensity Interval Training.


Assuntos
Treinamento Intervalado de Alta Intensidade , Perda de Peso , Abdome , Tecido Adiposo , Adulto , Feminino , Humanos
19.
J Sports Sci ; 37(21): 2492-2498, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31319760

RESUMO

INTRODUCTION: High-Intensity Interval Training (HIIT) and Constant-Intensity Endurance Training (CIET) improves peak oxygen uptake (V̇O2) similarly in adults; but in children this remains unclear, as does the influence of maturity. METHODS: Thirty-seven boys formed three groups: HIIT (football; n = 14; 14.3 ± 3.1 years), CIET (distance runners; n = 12; 13.1 ± 2.5 years) and a control (CON) group (n = 11; 13.7 ± 3.2 years). Peak V̇O2 and gas exchange threshold (GET) were determined from a ramp test and anaerobic performance using a 30 m sprint pre-and-post a three-month training cycle. RESULTS: The HIIT groups peak V̇O2 was significantly higher than the CON group pre (peak V̇O2: 2.54 ± 0.63 l·min-1 vs 2.03 ± 0.53 l·min-1, d = 0.88; GET: 1.41 ± 0.26 l·min-1 vs 1.13 ± 0.29 l·min-1, d = 1.02) and post-training (peak V̇O2: 2.63 ± 0.73 l·min-1 vs 2.08 ± 0.64 l·min-1, d = 0.80; GET: 1.32 ± 0.33 l·min-1 vs 1.15 ± 0.38 l·min-1, d = 0.48). All groups showed a similar magnitude of change during the training (p > 0.05). CONCLUSION: HIIT was not superior to CIET for improving aerobic or anaerobic parameters in adolescents. Secondly, pre- and post-pubertal participants demonstrated similar trainability.


Assuntos
Treino Aeróbico , Treinamento Intervalado de Alta Intensidade , Consumo de Oxigênio/fisiologia , Troca Gasosa Pulmonar/fisiologia , Adolescente , Estatura , Índice de Massa Corporal , Peso Corporal , Criança , Humanos , Masculino , Corrida/fisiologia , Maturidade Sexual/fisiologia , Futebol/fisiologia
20.
BMC Cancer ; 19(1): 653, 2019 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-31269914

RESUMO

BACKGROUND: Anthracycline-based chemotherapy is associated with reduced cardiorespiratory fitness in breast cancer patients. High intensity interval training (HIIT) induces greater benefits on cardiorespiratory fitness than moderate continuous aerobic exercise in patients with heart failure. The study purpose was to determine whether a HIIT intervention is a feasible exercise strategy for breast cancer patients undergoing anthracycline-based chemotherapy. METHODS: Thirty women were randomized to either HIIT or non-exercise control group (CON). Participants performed a maximal cycling fitness test to measure peak power output during maximal oxygen uptake (VO2max). The HIIT group participated in an 8-week HIIT intervention occurring 3 times weekly. Feasibility was calculated by computing (1) the average weekly minutes of HIIT over 8 weeks and (2) the number of sessions attended and multiplied by 100 (percentage of sessions). The intervention was considered feasible if more than 50% of participants completed both an average of 70% of weekly minutes (63/90 min) and attended 70% exercise sessions (17/24 sessions). RESULTS: Participants were 46.9 ± 9.8 (mean ± SD) years old, diagnosed with clinical stage II (30%) or III (63%) breast cancer. The average weekly minutes of exercise completed was 78 ± 5.1 out of 90 min. Twelve of 15 participants met both feasibility criteria, attending 19.2 ± 2.1 out of 24 sessions (82.3%). VO2max was maintained (19.7 ± 8.7 to 19.4 ± 6.6 ml/kg/min) in HIIT group (p = 0.94) while there was a significant decrease in VO2max (18.7 ± 7.1 to 16.1 ± 6.0 ml/kg/min) in CON group from baseline to 8 weeks (p = 0.001). CONCLUSIONS: HIIT is a feasible exercise intervention to maintain VO2max in breast cancer patients receiving anthracycline-based chemotherapy. TRIAL REGISTRATION: The protocol and informed consent were approved by the institutional IRB (HS-12-00227) and registered ( ClinicalTrials.gov NCT02454777; date of registration: May 272,015).


Assuntos
Antraciclinas/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Treinamento Intervalado de Alta Intensidade , Consumo de Oxigênio , Aptidão Física , Antraciclinas/efeitos adversos , Neoplasias da Mama/patologia , Neoplasias da Mama/fisiopatologia , Estudos de Viabilidade , Feminino , Humanos , Pessoa de Meia-Idade , Projetos Piloto
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