Twenty male subjects and twenty female subjects in each of three age categories, 6 to 8 years, 14 to 16 years, and 23 to 28 years, were tested on the Cybex Isokinetic Dynamometer to obtain normative strength values for the ankle plantar flexor muscle group. Values were established for both isokinetic and isometric contractions at two speeds. The results indicate that age and weight are the significant variables in determining strength scores.
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J. E. Falkel (1978) studied this question.