RESUMO
Mobility difficulties for people with Parkinson's disease (PwPD) are more pronounced when they perform a simultaneous cognitive task while walking. Although it is known that neurodegeneration results in widespread motor and brain impairments, few studies have comprehensively examined possible physical and mental determinants of dual task walking in PwPD. In this cross-sectional study, we aimed to investigate if and how muscle strength (sit-to-stand 30-sec test), cognition (mini-mental state examination) and functionality (timed up and go test) affect walking performance (10-meter walking test) with and without arithmetic dual task from older adults with and without Parkinson's disease. Walking speed was reduced by 16% and 11% with arithmetic dual task for PwPD (from 1.07±0.28 to 0.91±0.29 m.s-1, p<0.001) and older adults (from 1.32±0.28 to 1.16±0.26 m.s-1, p=0.002) compared to essential walking. The cognitive state was similar among the groups, but it was only associated with the dual-task walking speed in PwPD. In PwPD, lower limb strength was the better predictor of speed, whereas mobility was more related to it in older adults. Therefore, future exercise interventions aiming to improve walking in PwPD should consider these findings to maximize their effectiveness.
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Marcha , Doença de Parkinson , Humanos , Idoso , Marcha/fisiologia , Doença de Parkinson/psicologia , Velocidade de Caminhada , Estudos Transversais , Equilíbrio Postural/fisiologia , Estudos de Tempo e Movimento , Caminhada/fisiologia , Cognição/fisiologiaRESUMO
OBJECTIVE: The aim of the present study was to associate phase angle (PhA) with sarcopenia and its components in physically active older women. METHODS: A cross-sectional study was performed with 94 physically active older women. PhA and muscle mass were assessed by bioelectrical impedance. Muscle strength was measured by handgrip strength (HGS) and functional capacity was evaluated by 4-meter walk test. Sarcopenia was diagnosed according to the European Consensus on Definition and Diagnosis of Sarcopenia (2010). Participants were evaluated according to the PhA tercile. The individuals were divided into two groups: 1st vs. 2nd and 3rd terciles. The individuals in the first tercile were considered having low PhA (< 5.7º). RESULTS: Low PhA was not associated with sarcopenia (OR = 1.50 (0.520-4.319)), low muscle mass index (OR = 1.50 (0.520-4.319)), low HGS (OR = 3.15 (0.954-10.401)) and low walk speed (OR = 1.46 (0.384-5.534)). In addition, PhA had a weak correlation with walk speed (r = 0.24, p = 0.023) and walk speed was able to predict the PhA variations by 3.9%. CONCLUSION: PhA was not associated with sarcopenia and its components in physically active older women. Although PhA was correlated with walk speed, the biological meaning of this association is questionable, since the power of the prediction was low.
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Força Muscular , Sarcopenia , Idoso , Estudos Transversais , Impedância Elétrica , Feminino , Força da Mão , Humanos , Sarcopenia/diagnóstico , Velocidade de CaminhadaRESUMO
Aging involves physical and cognitive deterioration in older adults. Detecting predictors of dementia early is crucial to identify its onset. This study aimed to associate physical and psychological determinants with cognitive performance in older adults. Observational study with 221 older adults, classified according to cognitive impairment. We evaluated cognitive function by Mini-Mental State Examination. Physical determinants encompassed muscle strength, functional mobility, and cardiorespiratory fitness, while psychological consisted of quality of life and activities of daily living. Multiple linear regression was performed to investigate this relationship. Physical and psychological determinants were significantly linked to cognitive impairment, including lower muscle strength, reduced functional mobility and of cardiorespiratory fitness. The influence of environment, autonomy, and engagement in daily activities on cognitive impairment was also observed. The analysis of physical and psychological determinants could help to aid in distinguishing individuals with cognitive impairment.
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Atividades Cotidianas , Envelhecimento , Cognição , Disfunção Cognitiva , Qualidade de Vida , Humanos , Idoso , Feminino , Masculino , Cognição/fisiologia , Disfunção Cognitiva/fisiopatologia , Disfunção Cognitiva/psicologia , Envelhecimento/psicologia , Envelhecimento/fisiologia , Idoso de 80 Anos ou mais , Força Muscular/fisiologia , Aptidão Cardiorrespiratória/fisiologia , Testes de Estado Mental e DemênciaRESUMO
To compare the acute effects of aquatic walking/running versus dry-land walking/running on blood glucose and plasma renin activity (PRA) in individuals with type 2 diabetes, participants with type 2 diabetes performed deep-water or dry-land walking and/or running sessions in a swimming pool or on an athletics track, respectively. Both sessions comprised seven blocks of 3 min at 85-90% of the heart rate deflection point (HRDP), interspersed with 2 min at <85% HRDP, totaling 35 min, with a 48 h interval between sessions. PRA and blood glucose were assessed before and immediately after the sessions. Generalized estimation equations were used to verify the session effects, with the Bonferroni post hoc test, considering the significance level as 0.05. Twelve individuals (53.2 ± 8.9 years) diagnosed with type 2 diabetes for 6.3 ± 6.34 years participated in the study. A reduction in PRA was found only after the aquatic session (-7.75 ng/mL/h; -69%; p: 0.034), while both aquatic and dry-land sessions similarly reduced the blood glucose levels (aquatic: -38 mg/dL, -21%; dry-land: -26 mg/dL, -14%; time effect, p = 0.007). Despite yielding similar glycemic reductions as dry-land walking/running, aquatic walking/running led to an expressive decrease in PRA among individuals with type 2 diabetes.
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Glicemia , Diabetes Mellitus Tipo 2 , Renina , Caminhada , Humanos , Diabetes Mellitus Tipo 2/sangue , Diabetes Mellitus Tipo 2/terapia , Pessoa de Meia-Idade , Masculino , Renina/sangue , Feminino , Glicemia/análise , Exercício Físico/fisiologia , Corrida/fisiologia , AdultoRESUMO
BACKGROUND: Despite the robust body of evidence for the benefits of home-based physical exercise, there is still a paucity of data on the benefits of home-based cognitive training for older adults, especially in those at increased risk of clinical-functional vulnerability. As such, the present study aims to compare the chronic effects of a telehealth-delivered physical training intervention alone or combined with a cognitive training program in older adults at increased clinical-functional vulnerability risk. METHODS: A randomized clinical trial will be conducted including 62 sedentary older individuals classified as at increased risk of clinical-functional vulnerability based on their Clinical-Functional Vulnerability Index score. Participants will be randomly allocated in a 1:1 ratio to one of two groups, an intervention group including physical training combined with cognitive training, or an active control group including physical training alone. Both groups will receive home-based supervised training remotely for 12 weeks and will be assessed for the primary and secondary outcomes of the study before and after the training period. Primary outcomes include cognitive function and dynamic balance with a dual task. Secondary outcomes encompass physical, cognitive, and occupational performance, functional capacity, quality of life, and anxiety and depression symptoms, as well as hemodynamic measures. Data analysis will be performed by intention-to-treat and per protocol using mixed linear models and Bonferroni's post hoc (α = 0.05). DISCUSSION: Our conceptual hypothesis is that both groups will show improvements in the primary and secondary outcomes. Nevertheless, we expect physical combined with cognitive training to improve cognitive function, dual task, and occupational performance to a greater degree as compared to physical training alone. TRIAL REGISTRATION: NCT05309278. Registered on April 4, 2022.
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Treino Cognitivo , Qualidade de Vida , Humanos , Idoso , Ansiedade , Transtornos de Ansiedade , Cognição , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
The purpose of the present study was to compare the physiological responses of oxygen uptake (VO(2)) and energy expenditure (EE) in two different aquatic resistance training protocols performed with three sets of 20 seconds (3 × 20) and six sets of 10 seconds (6 × 10) and with and without Speedo Resistance Equipment. Ten young healthy women volunteers, familiar with exercises in an aquatic environment, participated in this study. The four separate protocols were randomly selected and performed at a 48-hour interval by the same instructor. The total time of the 3 × 20 protocol was 34 minutes and that of the 6 × 10 protocol was 43 minutes, and all exercises were performed at maximal speed and amplitude. Although the protocols had different total times, they included one minute of stimulus per muscle group and the same time intervals. EE(gross) and EE(net) values were higher in the 6 × 10 protocol than in the 3 × 20 one. The variables VO(2) and EE(min) did not present significant difference between the protocols. VO(2), EE(gross), EE(net) and EE(min) values were higher when the equipment was used (W situation) than when it was not (WO situation). In the postexercise analysis, the W situation also showed higher VO(2) and EE(gross) values than the WO situation. Therefore, this study suggests the use of Speedo Resistance Equipment to increase VO(2) and EE, and it also suggests lengthier aquatic resistance training to obtain greater EE values per session.
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Metabolismo Energético/fisiologia , Consumo de Oxigênio/fisiologia , Treinamento Resistido/métodos , Equipamentos Esportivos , Feminino , Humanos , Esforço Físico/fisiologia , Treinamento Resistido/instrumentação , Água , Adulto JovemRESUMO
BACKGROUND: To compare the effects of aquatic aerobic and combined (aerobic more resistance) training on glycemic control and other cardiometabolic outcomes in patients with type 2 diabetes. METHODS: Patients were randomized to an aquatic aerobic training (AERO, n = 19; 57.5 [7.4] y; 9 [47%] women), or an aquatic combined training (COMBI, n = 19; 60.9 [7.4] y; 10 [53%] women), or an aquatic active procedure control (n = 19; 58.6 [9.7] y; 10 [53%] women) in 3 weekly sessions (50 min each), during 15 weeks. Glycated hemoglobin was the primary outcome, whereas insulin resistance markers, lipid profile, systemic inflammation, renin concentration, blood pressure, physical activity levels, and sitting time were secondary outcomes. RESULTS: Glycated hemoglobin was reduced in all groups (P = .021), although changes were more marked in AERO (-0.36%) and COMBI (-0.44%) than in active control (-0.26%) group. Lipid profile was similarly modified in all groups. Diastolic blood pressure and renin concentration were also reduced in all groups; however, renin showed more marked reductions in AERO (-17.7 uIU/mL) and COMBI (-15.1 uIU/mL) than in active control (0.2 uIU/mL) group. Fasting insulin, triglycerides, C-reactive protein, systolic blood pressure, walking time, and sitting time on weekends were not modified. CONCLUSION: AERO and COMBI presented similar effect to improve glycemic control and some cardiometabolic risk factors in patients with type 2 diabetes.
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Fisioterapia Aquática , Diabetes Mellitus Tipo 2 , Treinamento Resistido , Idoso , Glicemia/metabolismo , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/terapia , Feminino , Hemoglobinas Glicadas/metabolismo , Humanos , Masculino , Pessoa de Meia-Idade , Renina , TriglicerídeosRESUMO
The purpose of the present study was to analyse vertical ground reaction force (Fz) and oxygen uptake (VO2) responses in six different water-based exercises performed at different cadences by postmenopausal women. Twelve postmenopausal women (57.3 ± 2.6 years, 158.1 ± 6.9â cm, 69.1 ± 10.9â kg) voluntarily took part in the study. Participants completed six sessions corresponding to maximal tests for each water-based exercise. Then, two sessions were performed for the experimental protocols, which comprised the performance of three exercises at three cadences (80, 100 and 120â bâ min-1), with Fz and VO2 measurements. Peak (Fzpeak) and impulse of Fz were determined. In addition, VO2 percentages relative to maximal VO2 (VO2max) values obtained in each maximal test were expressed as %VO2max. Data were analysed using two-way ANOVA with repeated measures (α = 0.05). As results, significant differences were found in Fzpeak and impulse between the water-based exercises, with similar VO2 and %VO2max values between them for each cadence. In addition, with the increasing cadence, Fzpeak (0.20-0.80â BW), VO2 (5.3-9.4â mlâ kg-1â min-1) and %VO2max (32.1-57.6%) values increased, while impulse (0.20-0.07â N.s/BW) values were reduced. Therefore, for a same physiological intensity, postmenopausal women experience different Fz loads during different water-based exercises.
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Fenômenos Biomecânicos/fisiologia , Exercício Físico/fisiologia , Consumo de Oxigênio/fisiologia , Condicionamento Físico Humano/métodos , Água , Análise de Variância , Feminino , Humanos , Pessoa de Meia-IdadeRESUMO
Different parameters can be used to control the intensity of aerobic exercises, a choice that should consider the population and exercise environment targeted. Therefore, our study aimed to verify the relationship between oxygen uptake (VO2), heart rate (HR), rating of perceived exertion (RPE), and cadence during an aquatic incremental test in older women. Nine older women (64.3 ± 4.4 years) engaged in a water-based aerobic training performed an aquatic incremental test using the stationary running exercise (cadence increases of 15 b·min-1 every 2 min) until participants' volitional exhaustion. VO2, HR, and RPE data were measured, and the percentage of peak VO2 (%VO2peak) and percentage of maximal HR (%HRmax) were calculated. Linear and polynomial regression analyses were performed (α = 0.05). Polynomial regressions revealed the best adjustments for all analyses. Data showed a significant relationship (p < 0.001) between %VO2peak and %HRmax (r = 0.921), %VO2peak and RPE (r = 0.870), and %HRmax and RPE (r = 0.878). Likewise, significant relationships between cadence (p < 0.001) and %VO2peak (r = 0.873), %HRmax (r = 0.874), and RPE (r = 0.910) were also observed. In summary, the physiological, subjective, and mechanical variables investigated were highly associated during an aquatic incremental test to exhaustion in older women. Therefore, these different parameters can be employed to adequately prescribe water-based programs according to preference and availability.
Assuntos
Teste de Esforço , Frequência Cardíaca , Consumo de Oxigênio , Percepção , Esforço Físico , Idoso , Exercício Físico , Teste de Esforço/estatística & dados numéricos , Feminino , Humanos , Pessoa de Meia-Idade , NataçãoRESUMO
BACKGROUND: There are a lack of clinical trials with suitable methodological quality that compare aquatic exercise training types in type 2 diabetes (T2D) treatment. This study aimed to compare the effects of aerobic and combined aquatic training on cardiorespiratory outcomes in patients with T2D. METHODS: Untrained patients with T2D were randomized to receive an aerobic aquatic training, a combined aquatic training, or a procedure control in 3 weekly sessions for 15 weeks. The sessions were 50 minutes long. The intensities were from 85% to 100% of heart rate of anaerobic threshold and at maximal velocity for aerobic and resistance parts, respectively. Resting heart rate, peak oxygen uptake (VO2peak), and oxygen uptake corresponding to second ventilatory threshold and its relation with VO2peak were evaluated. RESULTS: Participants were 59.0 (8.2) years old and 51% women. Intervention groups increased in VO2peak (aerobic aquatic training group: 4.48 mL·kg-1·min-1, P = .004; combined aquatic training group: 5.27 mL·kg-1·min-1; P = .006) and oxygen uptake corresponding to second ventilatory threshold, whereas the control group presented an increase in oxygen uptake corresponding to second ventilatory threshold and minimal change in VO2peak. CONCLUSIONS: Aerobic and combined aquatic exercise interventions improve the cardiorespiratory fitness of patients with T2D.
Assuntos
Aptidão Cardiorrespiratória , Diabetes Mellitus Tipo 2 , Diabetes Mellitus Tipo 2/terapia , Exercício Físico , Terapia por Exercício , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Consumo de OxigênioRESUMO
PURPOSE: There is physiological and biomechanical evidence suggesting a possible advantage of using poles in walking training programs. The purpose of this proof-of-concept study was to test the hypothesis that untrained elderly training Nordic walking for eight weeks will show higher improvements on the functional mobility, quality of life and postural balance than that training without poles; more likely to occur in self-selected walking speed (primary outcome), and the locomotor rehabilitation index than the quality of life, the static balance and the dynamic stability. It was a two-arm randomized sample- and load-controlled study. METHODS: Thirty-three untrained older people were randomly assigned into Nordic walking (n = 16, age: 64.6±4.1 years old) and free walking (n = 17, age: 68.6±3.9 years old) training groups. RESULTS: Improvements in the self-selected walking speed (primary outcome, p = 0.011, ES = 0.42 95%CI -0.31 to 1.16), locomotor rehabilitation index (p = 0.013, ES = 0.36; (95%CI -0.39 to 1.10), quality of life (p<0.05), static balance (p<0.05) and dynamic variability (p<0.05) were found in both groups. CONCLUSIONS: The hypothesis was not supported, our findings indicated that after 8 weeks, the Nordic walking training did not result in greater improvements than free walking training for the primary outcome (self-selected walking speed) and most of the secondary outcomes (including locomotor rehabilitation index, static balance, dynamic stability, and psychological and social participation domains of quality of life). TRIAL REGISTRATION: ClinicalTrials.gov NCT03096964.
Assuntos
Exercício Físico/fisiologia , Equilíbrio Postural/fisiologia , Qualidade de Vida , Amplitude de Movimento Articular , Caminhada/fisiologia , Idoso , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
PURPOSE: To compare the effects of three water-based resistance trainings on neuromuscular parameters of older women. METHOD: Thirty-six women were randomized to groups: simple set of 30 seconds (1 × 30 s, 66.41 ± 4.71 years, n = 12), multiple sets of 10 seconds (3 × 10 s, 66.50 ± 4.74 years, n = 11), and simple set of 10 seconds (1 × 10 s, 65.23 ± 3.93 years, n = 13). Maximal isometric strength concomitantly with neuromuscular activity during extension and flexion knee was evaluated. In the same exercises, rate of force development at different time intervals was measured. Finally, functional capacity was assessed. RESULTS: All trainings promoted similar improvements in the rate of force develpment of extension (effect size RFD 50 ms: 1 × 30 s .49, 3 × 10 s .67, 1 × 10 s .65; ES RFD 100 ms: 1 × 30 s .76, 3 × 10 s .80, 1 × 10 s .63; ES RFD 250 ms: 1 × 30 s .31, 3 × 10 s .49, 1 × 10 s .37) and flexion knee (ES RFD 50 ms: 1 × 30 s .59, 3 × 10 s .31, 1 × 10 s .48; ES RFD 100 ms: 1 × 30 s .41, 3 × 10 s .44, 1 × 10 s .42; ES RFD 250 ms: 1 × 30 s .57, 3 × 10 s .36, 1 × 10 s .43; ES RFD maximal: 1 × 30 s .63, 3 × 10 s .23, 1 × 10 s .26), however only the 3 × 10 s group improved the performance in the 8-foot up-and-go test (ES 3 × 10 s: .93, 1 × 30: .39, 1 × 10 s: .23). There was a maintenance of the isometric force and neuromuscular activity, except for the activity of the rectus femoris that showed an increase after training in all groups (ES 3 × 10 s: .04, 1 × 30: .36, 1 × 10 s: .50). CONCLUSION: Water-based resistance training using simple or multiple sets promotes the same gains in rapid strength, however only multiple sets induced improvement on functional capacity.
Assuntos
Força Muscular/fisiologia , Músculo Esquelético/fisiologia , Treinamento Resistido/métodos , Idoso , Estatura , Índice de Massa Corporal , Teste de Esforço , Feminino , Humanos , Contração Isométrica , Joelho/fisiologia , Estudos Longitudinais , Pessoa de Meia-Idade , Músculo Esquelético/inervação , Músculo Quadríceps/fisiologia , Natação , ÁguaRESUMO
Purpose: To analyze the agreement between the velocity, heart rate, and oxygen uptake values corresponding to second ventilatory threshold and glycemic threshold in patients with type 2 diabetes. Methods: Twenty-four untrained patients (55.1 ± 8.9 years) were evaluated. Three different parameters of training intensity corresponding to anaerobic threshold, one mechanical (velocity) and two physiological (heart rate and oxygen uptake) parameters, were identified by a classical method (second ventilatory threshold) and by an alternative method (glycemic threshold). To determine the threshold values, patients performed an incremental treadmill test, with an initial velocity of 3 km.h-1 for 3 min, that was then increased by 1 km.h-1 every 2 min. Comparisons between mean values and the degree of agreement between second ventilatory threshold and glycemic threshold were analyzed using the paired t-test and Bland-Altman test, respectively. Results: All patients performed the tests appropriately, and no adverse effects were recorded. Patients demonstrated similar mean velocity (p = 0.25), heart rate (p = 0.97) and oxygen uptake (p = 0.71) between the ventilatory threshold (6.4 ± 0.6 km.h-1, 130.1 ± 18.7 bpm, 15.2 ± 3.5 ml.kg.min-1) and the glycemic threshold (6.2 ± 0.9 km.h-1, 130.2 ± 12.8 bpm, 15.0 ± 3.8 ml.kg.min-1). Conclusion: The present study indicates an agreement between the glycemic and second ventilatory methods in determination of the anaerobic threshold of patients with type 2 diabetes; and thus, either method may be used for these patients.
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PURPOSE: The purpose of this study was to investigate the acute effects of water-based aerobic exercises on the performance of water-based resistance exercises by assessing kinematic parameters during protocols and neuromuscular responses after them. METHOD: Ten women performed 2 water-based protocols (i.e., resistance and concurrent water-based exercises) on separate days. We evaluated isometric force and electromyographic signal (sEMG) before and after protocols and analyzed kinematic parameters during a water-based resistance exercise. RESULTS: There was no significant difference between knee extension force production and sEMG from the vastus lateralis during the maximal voluntary contraction performed before and after the protocols. However, sEMG from the rectus femoris presented a significant difference between pretest and posttest measurements in both water-based protocols with greater values in the measurement after the end of the protocol (p = .046). The peak angular velocity of knee extension and mean angular velocity of knee extension and flexion showed similar values among the sets, with no difference between protocols. The peak angular velocity of knee flexion presented greater values in the water-based resistance exercises compared with the water-based concurrent protocol in the last set (p < .001). CONCLUSION: The main impairment induced by the water-based concurrent exercises was the lower peak angular velocity in the knee flexors compared with water-based resistance exercises alone.
Assuntos
Exercício Físico/fisiologia , Articulação do Joelho/fisiologia , Músculo Esquelético/fisiologia , Treinamento Resistido/métodos , Adulto , Fenômenos Biomecânicos , Eletromiografia , Feminino , Humanos , Contração Isométrica , Fadiga Muscular/fisiologia , Recrutamento Neurofisiológico , ÁguaRESUMO
OBJECTIVES: To compare the effects of two aerobic training models in water and on dry-land on quality of life, depressive symptoms and sleep quality in patients with type 2 diabetes. DESIGN: Randomized clinical trial. METHODS: Thirty-five patients with type 2 diabetes were randomly assigned to aquatic aerobic training group (n=17) or dry-land aerobic training group (n=18). Exercise training length was of 12 weeks, performed in three weekly sessions (45min/session), with intensity progressing from 85% to 100% of heart rate of anaerobic threshold during interventions. All outcomes were evaluated at baseline and 12 weeks later. RESULTS: In per protocol analysis, physical and psychological domains of quality of life improved in both groups (p<0.05) without between-group differences. Overall quality of life and sleep quality improved in both groups (p<0.05), without between-group differences in per protocol and intention to treat analysis. No changes on depressive symptoms were observed in both groups at follow-up. CONCLUSIONS: Aerobic training in an aquatic environment provides similar effects to aerobic training in a dry-land environment on quality of life, depressive symptoms and sleep quality in patients with type 2 diabetes. Clinical trial reg. no. NCT01956357, clinicaltrials.gov.
Assuntos
Depressão/terapia , Diabetes Mellitus Tipo 2 , Terapia por Exercício/métodos , Qualidade de Vida , Transtornos do Sono-Vigília/terapia , Idoso , Limiar Anaeróbio/fisiologia , Depressão/complicações , Depressão/psicologia , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Transtornos do Sono-Vigília/complicações , Transtornos do Sono-Vigília/psicologia , ÁguaRESUMO
The aim of the present study was to compare the effects of water-based aerobic training and water-based resistance training on muscular strength and cardiorespiratory fitness in older women. Sixty-nine individuals were randomized into the following three groups: the water-based aerobic training (WA, nâ¯=â¯23) group, the water-based resistance training (WR, nâ¯=â¯23) group, and the control group (CG, nâ¯=â¯23). Participants were trained two times per week for 10â¯weeks. The trainings presented a linear periodization with an increase in the volume-intensity relation. Maximal dynamic muscular strength and the cardiorespiratory fitness were evaluated before the start of training and after 10â¯weeks of training. Only the WA group showed an increase in maximal oxygen consumption (13.8%) and oxygen consumption at the second ventilatory threshold (16.4%). Maximal dynamic strength of knee extensors improved in 10.6% of WA, 8.0% of WR, and 4.7% of CG participants, without any difference between the groups. Maximal dynamic strength of knee flexors was increased in 14.1% of WA and in 17.7% of WR participants; however, it remains unchanged in CG participants. No differences were observed in resting heart rate, peak heart rate, heart rate at the second ventilatory threshold and maximal dynamic strength of shoulder horizontal flexors. It was concluded that WA seems to be more efficient for improvement in cardiorespiratory responses, and both WA and WR were efficient for development of maximal dynamic strength of knee flexion and extension.
Assuntos
Envelhecimento/fisiologia , Aptidão Cardiorrespiratória , Força Muscular , Treinamento Resistido/métodos , Idoso , Brasil , Feminino , Frequência Cardíaca , Humanos , Masculino , Pessoa de Meia-Idade , Consumo de Oxigênio , ÁguaRESUMO
BACKGROUND: Water-based resistance training (WRT) has been indicated to promote strength gains in elderly population. However, no study has compared different training strategies to identify the most efficient one. The aim of this study was to compare the effects of 3 WRT strategies on the strength and functional capacity of older women. METHODS: In total, 36 women were randomly allocated to training groups: simple set of 30 seconds [1 × 30s; 66.41 (1.36) y; n = 12], multiple sets of 10 seconds [3 × 10s; 66.50 (1.43) y; n = 11], and simple set of 10 seconds [1 × 10s; 65.23 (1.09) y; n = 13]. Training lasted for 12 weeks. The maximal dynamic strength (in kilograms) and muscular endurance (number of repetitions) of knee extension, knee flexion, elbow flexion, and bench press, as well as functional capacity (number of repetitions), were evaluated. RESULTS: All types of training promoted similar gains in maximal dynamic strength of knee extension and flexion as well as elbow flexion. Only the 1 × 30s and 1 × 10s groups presented increments in bench press maximal strength. All 3 groups showed increases in muscular endurance in all exercises and functional capacity. CONCLUSIONS: WRT using long- or short-duration simple sets promotes the same gains in strength and functional capacity in older women as does WRT using multiple sets.
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Força Muscular/fisiologia , Músculo Esquelético/fisiologia , Resistência Física/fisiologia , Amplitude de Movimento Articular/fisiologia , Treinamento Resistido/métodos , Idoso , Exercício Físico/fisiologia , Feminino , Humanos , Pessoa de Meia-Idade , Fatores de TempoRESUMO
Abstract Aim: Assess the effect of the performance order in the Concurrent Training (CT), Aerobic-Strength (AS), and Strength-Aerobic (SA), in the static balance, dynamic balance, and muscle strength in elderly people. Methods: The study involved 38 elderly people (men and women) aged 60 to 75 years old, divided into SA (n = 19) and AS (n = 19). Within 12 weeks, the aerobic training consisted of walking with intensity prescribed by the Borg's Rating of Perceived Exertion (6-20) and the strength training consisted of six exercises, with intensity controlled by Repetition Maximum training zones. Static balance (plantar pressure center area and displacement in bipedal support with eyes closed and open), dynamic balance (Timed Up and Go and Tandem Gait), and maximum dynamic strength of knee extension and bench press have been evaluated. For data analysis, Generalized Estimating Equations with Bonferroni's complimentary test have been used (α = 0.05). Results: For static and dynamic balance there hasn't been an effect on the 12 weeks of combined training, regardless of the performance order. Both groups maintained the balance variables within the intervention period. When it comes to strength, there has been a noticeable improvement in lower limbs (SA: 16%; AS: 11%; p < 0,001) and upper (SA: 22.0%; AS: 8.7%; p < 0.001), without any differences between the groups. Conclusion: So there is no difference between the order of performance of the CT in the variables of static and dynamic balance and strength of upper and lower limbs. Furthermore, after training, there have been significant improvements in the variables of strength and maintenance of static and dynamic balance.
Assuntos
Humanos , Pessoa de Meia-Idade , Idoso , Envelhecimento , Exercício Físico , Força Muscular , Exercícios de Alongamento Muscular , Ensaios Clínicos Controlados não Aleatórios como AssuntoRESUMO
Abstract Aim: To compare blood pressure (BP) responses among the different orders of execution of concurrent exercise (CE) sessions in controlled hypertensive older men. Methods: Fifteen older men (64 ± 5 years) participated in three randomized crossover sessions: control session (C), CE in aerobic-resistance order (AR), and resistance-aerobic order (RA). The CE was performed for 1 h, in which 30 min were for the resistance exercise with 5 exercises at 70% of 1RM and 30 min for the aerobic exercise on a treadmill with intensity corresponding to the first ventilatory threshold. Clinical systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean blood pressure (MBP) were measured at rest and over 2 h and 24 h after the session. For analysis, the Generalized Estimating Equations (GEE) test was used with Bonferroni's complimentary test (α = 0.05). Results: The SBP decreased by 30 min after AR, while after RA we obtained reductions during 1 h after a session concerning rest. Between sessions, we found lower values in both CE compared to the C at 30 min, 45 min, and 90 min. In the RA there was a lower pressure in relation to the C at minute 60. The DBP reduced 30 min after the AR regarding the pre-session, however with no difference between sessions. The MBP was lower in relation to 30 min rest after AR. Among sessions, a pressure drop was observed in the AR compared to the C at 30 min and 45 min. Conclusion: We can conclude that the CE was effective in generating post-exercise hypotension regardless of the order in controlled hypertensive older men.
RESUMO
This study aimed to investigate the effects of two periodized training programs of deep water running on functional fitness and blood pressure in the older adults. Thirty-six individuals were divided into continuous group (CONT) and interval group (INT). Both groups were trained for 28 weeks (twice weekly). Measures were performed before the training period, after 12 weeks and training period. Two-way ANOVA and post hoc of Bonferroni were used (α = 0.05). There were no differences between groups in functional tests, with the exception of the flexibility of the upper limbs, in which the INT group showed the highest values. There was a significant improvement in both groups of foot up-and-go test (CONT 6.45 to 5.67; INT 6.59 to 5.78, in seconds), flexibility of lower limbs (CONT -4.76 to -0.61; INT 0.54 to 4.63, in centimeters), strength of upper (CONT 18.76 to 27.69; INT 18.66 to 26.58, in repetitions) and lower limbs (CONT 14.46 to 21.23; INT 14.40 to 21.58, in repetitions), and 6-min walk (CONT 567.50 to 591.16; INT 521.41 to 582.77, in meters). No differences were shown between groups for systolic blood pressure; however, diastolic blood pressure remained higher in CONT during all training. The blood pressure decreased significantly in both groups after the training (CONT 142 ± 16/88 ± 3 to 125 ± 14/77 ± 7 mmHg; INT 133 ± 15/75 ± 7 to 123 ± 17 and 69 ± 11 mmHg). Both programs of deep water running training promoted improvements of similar magnitude in all parameters of functional fitness, with the exception of flexibility of upper limbs, and decreased blood pressure in the older individuals.