Gene A. Logan

Acquisition of Throwing Skill Involving Projectiles of Varying Weights

Abstract This investigation was conducted in order to determine if there were differences in the degree to which accuracy in throwing with the nonpreferred hand was developed when practice with projectiles of varying weights was used during the learning period. The effects of transfer of learning from the throwing of a ball of one weight to performance with a ball of another weight was also studied. The result indicated that practice with a light ball was as effective as practice with a heavier ball in developing skill to throw a heavier ball. Practice with the heavier ball when transferred to the lighter ball did not demonstrate a corresponding effect.

The effect of isometric exercise upon the strength of antagonistic muscles.

Summary1.Training of the elbow flexors by maximal isometric exercise produced a significant increase in the strength of their antagonists.2.There was no difference in the amount of strength increase at any of the three measured points in the arc of movement.