Arm (A), leg (L) and combined arm and leg (A + L) ergometry modes were compared at power outputs of 49, 73.5 and 98 W. Selected cardiorespiratory variables and a rating of perceived exertion (RPE) were measured for 19 males of mean age 25.7 (+/- 5.5) years. Oxygen uptake (VO2), heart rate (HR), minute ventilation and rating of perceived exertion (RPE) were all higher (p less than 0.01) in A compared with L and A + L. Gross mechanical efficiency was significantly lower in A (p less than 0.01) than in L or A + L. No differences were observed in any measurements between L and A + L. the correlations between RPE and cardiorespiratory variables were higher for A (RPE:VO2, r = 0.87, p less than 0.01; RPE:HR, r = 0.78 p less than 0.01) than for L and A + L.
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