Award Date

1-1-2001

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Kinesiology

First Committee Member

John Mercer

Number of Pages

95

Abstract

The purpose of the study was to investigate the effect of surface compliance on the cost and benefit of performing drop jumps (DJ). The cost was quantified using peak ground reaction force (GRF) (FPEAK), time to peak GRF (TFPEAK) and loading rate (LR). The benefit was quantified using lower extremity stiffness (K) and amortization phase (AMORT). Ten female subjects performed five DJ trials each on a force plate (C1), turf surface (C2) and aerobics mat (C3). GRF and kinematic data were recorded concurrently at 1000 Hz and 200 Hz, respectively. Dependent variables were analyzed using a repeated measures ANOVA. FPEAK was different between C3 and C2 (p < 0.05). TFPEAK was different (p < 0.05) and LR was different (p 0.05). It was concluded that surface stiffness plays a role in the costs and benefits of performing a DJ.

Keywords

Benefit; Compliance; Cost; Drop; Effects; Jumps; Performing; Surface

Controlled Subject

Physical therapy

File Format

pdf

File Size

2775.04 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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