Comparing contrast-relax stretching versus dynamic stretching on latissimus dorsi extensibility and throwing velosity in high school baseball players

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Issue Date
2017-04-28
Embargo End Date
Authors
Aaby, Kara
Reichmann, Ashton
Christense, Miles
Joshi, Neha
Ratzlaff, Corey
Advisor
Manske, Robert C.
Citation

Aaby, Kara, Reichmann, Ashton, Christensen, Miles, Joshi, Neha and Corey Ratzlaff. 2017. Comparing contrast-relax stretching versus dynamic stretching on latissimus dorsi extensibility and throwing velosity in high school baseball players -- In Proceedings: 13th Annual Symposium on Graduate Research and Scholarly Projects. Wichita, KS: Wichita State University, p.14

Abstract

This study explores the effects of stretching latissimus dorsi flexibility on shoulder range of motion (ROM) and their effects on throwing velocity. Methods: Baseline measurements for ROM and throwing velocity were gathered in session one. During the second and third sessions, subjects performed general stretches followed by a series of dynamic (DYN) or contract-relax stretching (CRS) respectively. Post-intervention ROM and velocity measurements were taken. Our hypothesis was there would be no difference in ROM or throwing velocity based on stretching technique. Statistical Analysis: A repeated measures ANOVA was used for stretch comparison. Alpha level set at p <0.05. Results: Following stretching, no differences were seen for shoulder internal rotation ROM (p = 0.49); however, CRS showed difference for external rotation (p = 0.005) and flexion shoulder ROM (p = 0.001). CRS and DYN improved throwing velocity (p = 0.049). Conclusions: CRS improved ROM. CRS and DYN improved throwing velocity.

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Description
Presented to the 13th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Rhatigan Student Center, Wichita State University, April 28, 2017.
Research completed in the Department of Physical Therapy, College of Health Professions
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