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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


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The Journal of Sports Medicine and Physical Fitness 2001 March;41(1):33-8

lingua: Inglese

Contributions of strenght and body composition to the gender difference in anaerobic power

Mayhew J. L. *, **, Hancock K. *, Rollison L. *, Ball T. E. ***, Bowen J. C. *

From the
* Human Performance Laboratory Truman State University, Kirksville, Missouri, USA
** Department of Physiology Kirksville College of Osteopathic Medicine Kirksville, Missouri, USA
***Neuromuscular Research Laboratory De Pauw University, Greencastle, Indiana, USA


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Background. The purpose of this study was to determine the significant factors contributing to the difference between men and women in anaerobic power (AP) generation.
Methods. Participants: college men (n=113) and women (n=175) were randomly selected for evaluation from a fitness class prior to training. Measures: AP was determined from the Margaria-Kalamen stair run. Dynamic strength was evaluated from the 1-RM single-leg extension. Body composition was estimated from gender-specific skinfold prediction equations.
Results. Discriminant analysis identified %fat, fat-free mass (FFM), and leg extension strength as significant components differentiating between men and women and allowed proper gender classification in 99% of the cases. When both strength and body composition variables were held constant by covariance, there was no significant difference between men and women in AP (F=1.25). A multiple regression equation using %fat, FFM, and leg extension strength predicted AP (R=0.91) with an error of 150 W. When the multiple regression equations was applied to a cross-validation sample, AP could be accurately predicted (r=0.91, t=0.17) with an average error of 3%±21%.
Conclusions. Body size and dynamic strength are the major factors explaining the explosive leg power difference between men and women without a specific or unique gender quality

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