Maximal exercise performance and lean leg volume in men and women

The purpose of this study was to compare the maximal exercise performance during cycle ergometry of 34 men and 47 women. External peak power output (OPP) and optimized pedalling rate (ORPM) were calculated from data gathered during an optimization procedure performed on a friction braked cycle ergometer. In addition, lean leg volume (LLV) and lean upper leg volume (LULV) were determined using an anthropometric technique. Both OPP and ORPM were greater in men than in women (1007+135 vs 673 +/- 109 Wand 119.5 +/- 7.0 vs 104.5 +/- 8.4 rev min-1 respectively; P0.001). The LLV and LULV were also greater in men than in women (7.41+0.82 vs 5.19 +/- 0.85 1 and 4.96 +/- 0.63 vs 3.35 +/- 0.621, respectively; P0.001). The ratio standards OPP/LLV and OPP/LULV did not differ significantly between men and women (136.3 + 14.7 vs 131.0+20.6 W 1-1 and 204.4 + 27.1 vs 204.4 +/- 37.9 Wl-1, respectively; P0.05). Peak power output was related to each of the anthropometric indices in both men and women (LLV: r=0.614 and 0.527, P 0.001; LULV: r=0.489 and 0.396, P0.01). Analysis of covariance revealed no significant differences between the groups in the variance about regression and the regression coefficients (/0.05), but the elevation of the regression lines did differ (i0.001). The results suggest that there are differences between maximal exercise performance in men and women that are independent of estimated lean leg volume. They also demonstrate that, in this case, consideration of ratio standards is misleading and that a comparison of regression standards is more appropriate.