The Wisconsin Wrestling Minimal Weight Project: Cross-Validation of Prediction Equations

in Pediatric Exercise Science
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Wisconsin has mandated minimal weight (MW) testing for high school wrestlers. In preparation, six MW predictions were cross-validated on 69 Wisconsin wrestlers (age 15.7±1.1 yrs, height 169.2±6.3 cm, weight 63.3±8.1 kg, percent fat 11.2±4.7%, and MW 58.9±6.9 kg). Minimal weight, defined as fat-free body/.93, determined by hydrostatic weighing (HW) and residual volume using 02 dilution, served as the criterion. Analyzed using repeated-measures ANOVA, statistically significant but clinically small (<1.3 kg) differences were shown in four of six predictions. Lohman 1, Lohman2, and Katch equations appear more appropriate with smaller mean differences, smaller total error, and higher correlations.

R. Clark and J. Kuta are with the U.W. Hospital Sports Medicine Center, University of Wisconsin, Madison, WI 53705. R. Oppliger is with the State Health Registry at the University of Iowa, Iowa City, IA 52242.

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