Abstract

Abstract Comparisons were made of the isotonic movement of the muscles in chinning and a similar isometric contraction with the hands held so that the forearms were in the positions of pronation, supination, and alternated; i.e., one pronated and one supinated. Data from 51 college men suggest that the position of the hands have little, if any, effect on scores. Differences among positions for isometric contractions were not significant. While differences were significant for chinning, the variation from position to position was no greater than that from trial to trial in the same position.

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