Efeitos fisiológicos agudos de exercícios contínuo e intermitente em sujeitos com obesidade

Léo Dutra Cabistany, Cristiano Dall' Agnol, Ariane Luçardo, Rodrigo Del Ponte, Fabricio Boscolo Del Vecchio

Resumo


Objetivou-se avaliar as respostas agudas de homens com sobrepeso/obesidade, segundo níveis de atividade (NAF) e de aptidão física (NApF). Realizou-se teste progressivo e, posteriormente, duas sessões de exercícios, uma com esforço contínuo (EC, com 60% da potência aeróbia máxima, PAM) e outra com intermitente (EIAI, 30s de esforços a 120% da PAM, 30s de recuperação passiva). Indivíduos com maior aptidão aeróbia exibiram menores valores de FC pré-treino (96,18 ± 10,84bpm versus 103,14 ± 11,01 bpm, p=0,04), de FC média (127,73 ± 10,54 bpm e 138,50 ± 18,28, p=0,02) e pico (146,50 ± 15,02 bpm e 158,27 ± 18,96 bpm, p=0,03) durante o treino. Ambos os protocolos mantiveram percentuais da FC máxima próximos a 80%, no entanto, a FC média de treino (p<0,05) e consumo máximo de oxigênio (p<0,05) foram estatisticamente superiores no EC. Por outro lado, [LAC] foi superior ao final do EIAI (p=0,03), e sujeitos com baixa aptidão aeróbia exibiram valores mais elevados (p<0,001). O EC gerou maior estresse cardíaco e o EIAI proporcionou maior [LAC]. O nível de AF parece não ser bom preditor de desempenho em obesos.

 

ABSTRACT 

Acute physiological effects of continuous and intermittent exercise in obese subjects 

The aim of this study was to assess the acute responses of overweight/obese men accordingly to their physical activity levels (PAL) and fitness levels (FL). The subjects performed a progressive test and, afterwards, two exercise sessions: One of them composed by continuous exercise (CE, at 60% of maximal aerobic power, PAM) and the other composed by high-intensity interval training (HIIT, 30s at 120% of maximal aerobic power, 30s of passive recovery). Individuals with higher fitness levels showed lower values of pre-training HR (96.18 ± 10.84 bpm versus 103.14 ± 11.01 bpm, p = 0.04), average HR (127.73 ± 10.54 bpm and 138.50 ± 18.28, p = 0.02) and peak (146.50 ± 15.02 bpm and 158.27 ± 18.96 bpm, p = 0.03) during exercise. Both protocols kept maxim HR close to 80%. However, average training HR (p < 0.05) and maxim oxygen uptake (p < 0.05) were statistically higher in CE. On the other hand, [LAC] was superior at the end of HIIT (p = 0.03), and subjects with lower aerobic fitness levels showed higher values (p < 0.001). CE generated bigger cardiac stress and HIIT generated higher [LAC] levels. Fitness level doesn’t seem to be a good predictor of performance in obese men.


Palavras-chave


Obesidade; Exercício Físico; Exercício aeróbio; Exercício intervalado de alta intensidade

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