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EFFECTS OF FATIGUE INDUCED BY INTERMITTENT RUNNING ON MUSCULAR STRENGTH, POWER, AND GLYCOGEN CONTENT IN FEMALE SOCCER PLAYERS

Stump, Regina (2017) EFFECTS OF FATIGUE INDUCED BY INTERMITTENT RUNNING ON MUSCULAR STRENGTH, POWER, AND GLYCOGEN CONTENT IN FEMALE SOCCER PLAYERS. Master's Thesis, University of Pittsburgh.

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Abstract

A majority of ACL injuries in female soccer players occur during the later stage of a game when fatigue is likely present. In a fatigued condition, reductions in the strength ratio of hamstrings to quadriceps and the lower extremity muscular strength and power can cause altered landing techniques that predispose female athletes to a higher risk of ACL injuries. Additionally, a significant reduction in the muscle glycogen content has been reported after a simulated soccer game. The current study investigates a role of the muscle glycogen content with knee strength and power in the presence of fatigue.
Seventeen female subjects participated in the study (age:21.5±2.9yrs, height:166.9±7.2cm, and weight:63.7±6.6kg). Before and after an intermittent running protocol, subjects completed a battery of testing including maximal isokinetic knee flexion and extension muscular strength normalized to their body weight (%BW), a depth -jump onto a force plate to measure reactive strength index (RSI), and non-invasive ultrasound-based muscle glycogen content of six lower limb muscle groups. Based on normality, paired t-tests or Wilcoxon signed-rank test were performed to compare the strength, RSI, and muscle glycogen content pre- and post-fatigue. Additionally, correlation analyses were used to examine the relationships between the baseline muscle glycogen level and the changes (post/pre-fatigue values) in muscle glycogen content with the changes in muscular strength and power. Significance was set at p<0.05 a priori.


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Details

Item Type: University of Pittsburgh ETD
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Stump, Reginarks39@pitt.edu
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee MemberFleishman Allison, Katelynkatelyn.allison@pitt.edu
Committee MemberConnaboy, Chrisconnaboy@pitt.edu
Committee MemberLovalekar, Mitamital@pitt.edu
Committee MemberDarnell, Matthewmed30@pitt.edu
Committee MemberPletcher, Erinerpletcher@gmail.com
Committee ChairNagai, Takashitnagai@pitt.edu
Date: 11 September 2017
Date Type: Publication
Defense Date: 10 August 2017
Approval Date: 11 September 2017
Submission Date: 7 August 2017
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 109
Institution: University of Pittsburgh
Schools and Programs: School of Health and Rehabilitation Sciences > Health and Rehabilitation Sciences
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: glycogen, non-invasive, running, soccer, intermittent
Date Deposited: 11 Sep 2017 15:16
Last Modified: 11 Sep 2017 15:16
URI: http://d-scholarship.pitt.edu/id/eprint/33031

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