Abstract

Arm and leg work was performed on bicycle ergometers in sitting position by fourteen women and sixteen men. Heart rate, minute volume of ventilation, (VE), and oxygen consumption (V02) were measured. Arm exercise was performed until (muscular) exhaustion, leg exercise up to a heart rate circa 170 beats/min. At comparable work loads arm exercise evoked higher V02, Ve, and heart rate than leg exercise irrespective of sex. At comparable V02, the heart rate and VE were higher during arm work in both sexes, VE more so among the men. With the same limbs working, the mechanical efficiency was equal in both sexes. The regression coefficients of heart rate on load or V02 was higher for the women irrespective of work type. A close correlation was obtained between working capacity at a heart rate of 170 beats/min (W170) during leg and arm exercise and between W170 of leg exercise and W 150, similarly calculated during arm work. Thus W170 of leg exercise could be calculated from either a maximal or submaximal arm work. Verf.-Referat