Lower body predictors of glenohumeral compressive force in high school baseball pitchers

Journal of Applied Biomechanics
David W KeeleyMichael R Torry

Abstract

The purpose of this study was to better understand how lower body kinematics relate to peak glenohumeral compressive force and develop a regression model accounting for variability in peak glenohumeral compressive force. Data were collected for 34 pitchers. Average peak glenohumeral compressive force was 1.72% ± 33% body weight (1334.9 N ± 257.5). Correlation coefficients revealed 5 kinematic variables correlated to peak glenohumeral compressive force (P < .01, α = .025). Regression models indicated 78.5% of the variance in peak glenohumeral compressive force (R2 = .785, P < .01) was explained by stride length, lateral pelvis flexion at maximum external rotation, and axial pelvis rotation velocity at release. These results indicate peak glenohumeral compressive force increases with a combination of decreased stride length, increased pelvic tilt at maximum external rotation toward the throwing arm side, and increased pelvis axial rotation velocity at release. Thus, it may be possible to decrease peak glenohumeral compressive force by optimizing the movements of the lower body while pitching. Focus should be on both training and conditioning the lower extremity in an effort to increase stride length, increase pelvis tilt toward t...Continue Reading

Citations

Nov 6, 2018·Medicine and Science in Sports and Exercise·Jacob HowensteinMichelle B Sabick
Mar 24, 2018·Journal of Strength and Conditioning Research·Kevin G LaudnerKeith Meister
Sep 29, 2020·Journal of Physical Therapy Science·Osamu Yanagisawa, Hidenori Taniguchi
Dec 23, 2020·International Journal of Sports Medicine·Jeff W BarfieldGretchen D Oliver
Feb 17, 2021·The American Journal of Sports Medicine·Kevin LaudnerKeith Meister

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