Date of Award

Spring 2010

Document Type

Thesis

Degree Name

Master of Science in Education (MSEd)

Department

Human Movement Sciences

Program/Concentration

Athletic Training

Committee Director

James Onate

Committee Director

Bonnie Van Lunen

Committee Member

Stacie Ringleb

Call Number for Print

Special Collections LD4331.E44 L83 2010

Abstract

Fatigue has been shown to alter the neuromechanics of lower extremity. To date, no study has examined the effects of two types of fatigue on kinetics and kinematics. To determine neuromechanical differences between two fatigue protocols [Slow Linear Oxidative Fatigue Protocol (SLO-FP) and Functional Agility Short-Term Fatigue Protocol (FAST-FP)] when performing an unanticipated sidestep cutting task. Fifteen female collegiate soccer players (age=19.2±0.8 years; height=l.67±0.05m; mass=61.7±8.lkg) participated in this study. Participants were free of lower extremity injury at time of participation, and performed five successful trials of a sidestep cutting (SS) task pre and post fatigue protocols. For the SLO-FP, a VO2peak test was conducted prior to the fatigue protocol. 5-minutes after the conclusion of VO2peak test subjects started the fatigue protocol by performing a 30-minute interval run with six intervals (four minutes at 70% ofVO2peak speed followed by one minute at 90% ofVO2peak speed). The FAST-FP consisted of 4 sets of a functional circuit that included: L-Drill, Ladder, Vertical Jumps, and step-ups. Repeated 2(time)x2(protocol) ANOVAs were conducted to assess task and fatigue differences. Alpha level set at .05. Independent variables were fatigue protocols and time. Dependent variables included kinematic and kinetic variables of hip flexion (HF), hip internal rotation (HIR), hip abduction (HAB), knee flexionc(KF), knee internal rotation (KIR), knee flexion moment (KFM), knee abduction moment (KABDM), and knee abduction (KAB), at initial contact (IC), peak stance phase (Max), peak knee flexion (PKF), peak vertical and posterior ground reaction forces (PVGRF and PPGRF, respectively). During the FAST-FP, participants had increased KIR (12.5±5.9°) when compared to the SLO-FP (7.9±5.4°, p

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DOI

10.25777/1j42-jh27

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