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.
The use and abuse of amphetamines in athletic locker rooms apparently has not significantly decreased even though many controlling agencies have banned their usage for sports participation. Research findings do not conclusively indicate that amphetamine improves sport performance, strength, or cardio-respiratory endurance; however, slight gains in reaction time may be obtained. Documentation of amphetamine abuse and research findings of the amphetamines as they are related to sport performance are included.
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