This study examined the extent to which variance in endurance performance could be explained by various physiological and morphological factors in 11-to 12-year-old girls (N = 33). [Vdot]O2 max (ml/kg/minute), determined in a multistage treadmill test, was significantly related to run time (r = -.70). However, when percentage of fat as estimated from skinfolds and girths was held constant, the partial correlation was.09. The correlation between the sum of five skinfolds and run time was.92; the greater amounts of subcutaneous fat were associated with poorer performance. The second independent variable to be selected into a forward selection regression equation was the score on an all-out 1-minute steptest, an indirect measure of anaerobic capacity. The third variable selected was an index of maturity-whether or not the girls had achieved menarche; the more mature girls tended to do worse on the run. These three variables accounted for 90% of the variance in run time (R =.95). The dominance of fat as a predictor of endurance performance was attributed to the extraordinary variability that exists in this parameter in girls of this age.
|Original language||English (US)|
|Number of pages||9|
|Journal||Research Quarterly of the American Alliance for Health, Physical Education and Recreation|
|State||Published - Mar 1978|
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation