Title page for ETD etd-04042012-082959

Type of Document Master's Thesis
Author Miskowiec, Ryan William-Ignatius
Author's Email Address rmisko1@tigers.lsu.edu
URN etd-04042012-082959
Title The Acute Effects of Stretching on Pennation Angle and Force Production
Degree Master of Science (M.S.)
Department Kinesiology
Advisory Committee
Advisor Name Title
Nelson, Arnold Committee Chair
Stewart, Laura Committee Member
Welsch, Michael Committee Member
  • muscle architecture
  • stretching
Date of Defense 2012-01-27
Availability unrestricted
PURPOSE: This study was designed to investigate the acute effects of stretching on pennation angle of the Medial Gastrocnemius and maximal voluntary isotonic plantar flexion. METHODS: 24 healthy college age subjects (14 female, 10 male, age 19-30) completed four trials using a randomized crossover design. Trials consisted of assessing the maximal voluntary isotonic contraction (MVC) and pennation angle (PA) before and after each treatment. Treatments consisted of either stretching (S) or mock stretching (MS). The S treatment involved four 30 second periods of stretching with 15 seconds of rest in between. During the MS treatment subjects were maintained in the same relative position as the S treatment, but were not stretched. RESULTS: There were no significant changes observed in PA from pre to post measurements, though during stretch PA was significantly reduced (p≤0.05). MVC was significantly reduced in the S treatments (p≤0.01). CONCLUSIONS: Stretching had little lasting effect on PA, while MVC was significantly reduced. This finding indicates PA is likely not strongly linked to the MVC reductions observed following stretching.
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