Abstract des Autors

This study assessed excess post-exercise oxygen consumption (EPOC) following upper body exercise (UBE) of different intensity and duration. Ten subjects, 5 male and 5 female (age: 26.7+/-4.9 yr; peak UBE oxygen uptake (VO2peak): 1.78+/-0.57 l/min, 25.6+/-5.8 ml/kg/min) performed three randomized tests on an arm crank ergometer: 1) low intensity, short duration (LS) = 35% VO2peak for 15 min; 2) low intensity, long duration (LL) = 35% VO2peak for 30 min; 3) high intensity, short duration (HS) = 70% VO2peak for 15 min. Subjects reported for all tests in the morning and in a fasted and rested state. Exercise was preceded by a 30 min seated baseline. Recovery VO2 was continuously monitored until baseline was re-established. EPOC duration and magnitude were significantly greater following HS, while LL and LS did not differ in response (duration and magnitude: HS = 14.0+/-6.5 min, 32.5+/-24.6 kJ; LL = 5.5+/-4.4 min, 12.3+/-8.6 kJ; LS = 5.7+/-4.9 min, 10.3+/-5.3 kJ). HS also had higher HR (73+/-10 b/min) at end-EPOC compared to LL (64+/-8 b/min) and LS (66+/-8 b/min), and baseline HS values (63+/-8 b/min). Results from this study indicate that UBE intensity has a greater effect on EPOC than exercise duration under these conditions. UBE appears to have similar EPOC patterns as lower body exercise. Verf.-Referat