Celebration of Scholarship and Creative Activity 2023
Chronic Effect of Postactivation Potentiation in High School Baseball PlayersChronic Effect of Postactivation Potentiation in High School Baseball Players
Jack Feye
Senior, Exercise and Sport Science
Abstract
The purpose of this study was to affect throwing velocity and shoulder internal rotation strength by inducing postactivation potentiation (PAP) through a longitudinal complex training program targeted at the shoulder internal rotational musculature in high school baseball players. Many studies have investigated the acute effects of PAP on various measures of athletic performance, but few have examined the results of utilizing PAP for prolonged periods. Subjects (n=5) were male high school baseball players at Kaukauna High School. They conducted maximal velocity throwing exercises twice per week for five weeks. The exercises consisted of five maximal velocity throws with a regulation baseball, each preceded by three heavy internal shoulder rotations using a resistance band (to induce PAP). There were four minutes of rest between the rotations and each throw. Pre- and post-intervention testing of throwing velocity and shoulder internal rotation strength was conducted to determine statistical significance. Mean changes in throwing velocity (+1.78 mph, p=0.30) and shoulder internal rotation strength (-6.19N, p=0.32) were not statistically significant; however, the general increase in throwing velocity suggests that chronic complex training may positively affect throwing velocity. The increase in throwing velocity despite the general decrease in shoulder internal rotation strength may suggest that any positive adaptations were mostly neural.
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