To determine the effects of arm-segment length and varying ball weights on the accuracy of an overarm ball throw, 55 male subjects aged 9 to 11 yr. were divided into short, medium, or long arm-length groups and threw a light (2 1/2 oz.), medium (5 oz.), and heavy (7 1/2 oz.) ball at a circular stationary target. Analysis showed that differences in the ball weights did not significantly vary accuracy scores obtained by boys with arms of short or medium length, while boys with long arms obtained significantly better accuracy when they threw heavy or medium-weight balls than when they threw a light-weight implement.
References
1.
BowneM. E.The relationship of selected measures of acting body levers to ball throwing velocities. Research Quarterly, 1960, 31, 392–402.
2.
BreitingerE.Body form and athletic achievement of youths. Research Quarterly, 1935, 6, 85–91.
3.
CreekR. E.The effect of overload warm-up on the accuracy of throwing a twelve-inch softball. Unpublished Master's thesis, Eastern Illinois Univer., 1964.
4.
EgstromG. H.LoganG. A.WallisE. L.Acquisition of throwing skill in volving projectiles of varying weights. Research Quarterly, 1960, 31, 420–425.
5.
JableJ. T.The relative effects of training with basketballs of varying weights upon free throw shooting accuracy. Unpublished Master's thesis, Pennsylvania State Univer., 1965.
6.
KirkR. E.Experimental design: Procedures for the behavioral sciences. Belmont, Calif.: Brooks/Cole, 1968.
7.
WatsonK. G.A study of the relation of certain measurements of college women to throwing ability. Research Quarterly, 1937, 8, 131–141.
