King Grub
2016-03-08, 21:10
Higher excess postexercise oxygen consumption (EPOC) after high-intensity interval exercise (HIE) and sprint interval exercise (SIE) may contribute to greater fat loss sometimes reported after interval training compared continuous, steady-state exercise (SSE) training. We compared excess postexercise oxygen consumption (EPOC) after HIE, SIE, and SSE. Ten recreationally active males (age 24 ± 4 y) participated in this randomized crossover study. On separate days, subjects completed a resting control trial and three exercise conditions on a cycle ergometer: HIE (four 4-min intervals at 95% HRpeak, separated by three min of active recovery); and SIE (six 30-s Wingate sprints, separated by four min of active recovery); and SSE (30 min at 80% of peak heart rate (HRpeak)). Oxygen consumption (VO2) was measured continuously during and for 3 h after exercise. For all conditions, VO2 was higher than resting control only during the 1 h postexercise. Although 3-h EPOC and total net EE after exercise were higher (p=0.01) for SIE (22.0 ± 9.3 L; 110 ± 47 kcal) compared to SSE (12.8 ± 8.5 L; 64 ± 43 kcal), total (exercise + postexercise) net O2 consumed and net EE were greater (p=0.03) for SSE (69.5 ± 18.4 L; 348 ± 92 kcal) than for SIE (54.2 ± 12.0 L; 271 ± 60 kcal). Corresponding values for HIE were not significantly different from SSE or SIE. EPOC after SIE and HIE is unlikely to account for the greater fat loss per unit EE associated with SIE and HIE training reported in the literature.
J Strength Cond Res. 2016 Mar 3. Excess postexercise oxygen consumption after high-intensity and sprint interval exercise, and continuous steady-state exercise.
J Strength Cond Res. 2016 Mar 3. Excess postexercise oxygen consumption after high-intensity and sprint interval exercise, and continuous steady-state exercise.