Relationship between Multiple Predictor Variables and Normal Biodex Eversion-Inversion Peak Torque and Angular Work

Michael T. Gross, Julia C. Brugnolotti

Normative data should help in the development of treatment goals. The purpose of this study was to generate predictive models relating isokinetic ankle testing performance to anthropometric and demographic variables. The subjects were 44 healthy females (age = 40.48, s = 11.98) and 43 healthy males (age = 39.83, s = 10.31) between the ages of 19 and 62. For each subject the investigators measured concentric peak torque and angular work at 60 and 120°/sec for Biodex eversion and inversion. Stepwise regression analyses were used to examine the relationship between each isokinetic variable and the following predictor variables: age, side of lower extremity dominance, height, weight, percentage of body fat, leg girth, and shoe size. Separate analyses were conducted for females and males. The results indicate a significant relationship (p < 0.001) between multiple variable models and the isokinetic performance variables. The magnitude of the relationships may be explained, in part, by the restricted range of Biodex eversion and inversion measurements of peak torque and angular work. The models generated in this study can be used to establish muscle performance goals for patient rehabilitation programs.

J Orthop Sports Phys Ther 1992;15(1):24-31.

Key Words: ankle muscle strength, anthropometric measures, modeling

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