| Abstrakt: |
FREEDSON, PATTY, VICTOR L. KATCH, STANLEY SADY, and ARTHUR WELTMAN. Cardiac output differences in males and females during mild cycle ergometer exercise. Med. Sci. Sports. Vol. 11, No. 1, pp. 1619, 1979. To study sex differences in cardiac output during submaximum exercise, eight male and eight female subjects were matched on max o21 min1and ml kg1min1. Each subject performed one, eight minute submaximum bicycle ergometer test at 35 of o2max 300 kpm min1. At a steady state mean o2of 0.96 1 min1, cardiac output was determined. Significant differences between men and women were observed p<.05 in cardiac output, stroke volume and av O2difference. The males had a lower cardiac output 1.75 1 min1and stroke volume 17.2 ml beat1and a higher av O2difference 2.01 vol . When these variables were expressed independent of lean body weight the above differences were nonsignificant. It was suggested that cardiac output differences between the sexes during mild exercise are due, in part, to differences in lean body weight. |
