Title page for ETD etd-07082009-152432

Type of Document

Master's Thesis

Author

Tahayori, Behdad

Author's Email Address

btahay2@tigers.lsu.edu

URN

etd-07082009-152432

Title

Effects of Exercising with a Weighted Vest on the Output of Lower Limb Joints in Countermovement Jumping

Degree

Master of Science (M.S.)

Department

Kinesiology

Advisory Committee

Advisor Name	Title
Arnol G. Nelson	Committee Chair
Dennis K. Landin	Committee Member
Michael Welsch	Committee Member

Keywords

biomechanics
exercise
weighted vest
counter movement jump

Date of Defense

2009-07-03

Availability

unrestricted

Abstract

The effect of exercising with a weighted vest equal to 15% of body mass on vertical jump height was assessed. It was hypothesized that the defined treatment protocol could enhance jumping performance by increasing hip, knee and ankle joint power. The findings of this study showed that the defined active stretching protocol significantly increases jump height in male participants (0.3364 m compared to0. 3456 m from pre to post exercise respectively) but did not yield a significant increase in females. No significant changes in joint angle, torque, power or velocity were observed between the pre and post exercise jumping. However, the pre-take off phase of jumping was significantly decreased after the exercise. Also a significant increase in the initial velocity was observed in the post loaded jumping in men (2.507 m/s Vs. 2.588 from pre to post exercise respectively).
Analysis of jumping with the weighted vest revealed numerous significant changes in temporal aspects of jumping as well as joint output. It was observed that performing the weighted jumping for five sets of three repetitions, could increase the jump height which was originally decreased by applying the vest.
Findings of the analysis of jumping with the weighted vest and those of jumping after the removal of the vest did not support the increase of a specific parameter for a specific joint. Rather, it suggests that the application of this treatment increases the performance by optimizing the timing of various movement sequences.

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