Acute Cardiopulmonary Response to Interval and Continuous Exercise in Older Adults: A Randomized Crossover Study.
Journal of strength and conditioning research(2020)
摘要
The purpose of this study was to compare the cardiopulmonary response with different exercise protocols in healthy older adults. Subjects (n = 30; 15 women, age: 69.6 +/- 6.2 years) completed an exercise test (MAX) on a cycle ergometer to determine maximal oxygen consumption (<(V) over dot>O(2)max) and peak power output (PPO). Exercise sessions were randomized: high-intensity interval exercise (HIIE, 1 minute 90% PPO followed by 1 minute 10% PPO, x10), moderate-intensity continuous exercise (MOD, 20 minutes at 50% PPO), and sprint-interval exercise (SPRT, 20 seconds "all-out" sprints followed by 2 minutes at 50 W, x3). <(V) over dot>O(2)max was highest during MAX in men (MAX: 28.2 +/- 6.3; MOD: 22.6 +/- 4.5; HIIE: 26.7 +/- 5.7; SPRT: 26.0 +/- 4.3; F(2.1) = 28.6, rho = 0.0001, eta(2)(rho) = 0.67), whereas similar peaks were observed between HIIE, SPRT, and MAX in women (MAX: 21.9 +/- 6.1; MOD: 18.9 +/- 4.5; HIIE: 21.6 +/- 5.3; SPRT: 21.7 +/- 3.9; F(2.2) = 10.2, rho = 0.0001, eta(2)(rho) = 0.42). The peak heart rate (b.min(-1)) was similar across all exercise sessions in both men (MAX: 148.1 +/- 17.1; MOD: 132.6 +/- 21.8; HIIE: 144.9 +/- 16.6; SPRT: 148.6 +/- 14.2; F(1.9) = 59.1, rho = 50.001, eta(2 )(rho)= 50.41) and women (MAX: 148.1 +/- 13.1; MOD: 136.3 +/- 18.2; HIIE: 147.0 +/- 16.4; SPRT: 148.5 +/- 18.0; F(2.0) = 5.3, rho = 0.011, eta(2 )(rho)= 50.27). The %<(V) over dot>O-2 at which sessions were performed varied significantly across individual subjects. In conclusion, older women work at near maximal <(V) over dot>O-2 when performing HIIE and SPRT; this has implications for exercise testing and prescription protocols in older adults.
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