| Abstrakt: |
The cardiorespiratory and performance responses to incremental-load treadmill (T) work and arm (A), leg (L), and combined arm and leg (A L) work on the Schwinn Air-Dyne ergometer were investigated in 15 men and 15 women. In both the men and women, maximal exercise heart rate (HRmax) and maximal oxygen uptake (O2max, L/min) were similar (P < .05) among L, A L, and T but significantly greater for A L and T work compared to A work. Maximal performance time increased progressively and significantly from A to L to A L work. In the men, O2maxproduced during A, L, and A L work represented 85, 95, and 98 of T work, respectively; in the women, O2maxproduced during A, L, and A L work represented 76, 87, and 94 of T work, respectively. For both the men and women, postexercise lactic acid was significantly greater for A work compared to L work but comparable between L, A L, and T work. During the submaximal phases of the ergometer tests, heart rate and O2for A work was significantly higher and mechanical efficiency significantly lower compared to L and A L work. |
