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.
(Unpublished)
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
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| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| 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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