Peterson, Patrick
(2024)
The Role of Non-Functional Overreaching and Neuromuscular Fatigue in Traumatic Injuries in NCAA Division-I Football.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
This series of studies explored the relationship between neuromuscular fatigue (NMF) and countermovement jump (CMJ) performance in NCAA Division I football athletes. Understanding NMF's impact on performance is crucial for reducing injury risk and optimizing performance. We used Exploratory Factor Analysis (EFA) to simplify CMJ data, uncovering performance constructs. Multi-Group Confirmatory Factor Analysis (MGCFA) tested these factors' stability across different fatigue states, challenging assumptions about fatigue's effect on CMJ performance. Further analysis focused on the relationship between salivary testosterone and cortisol ratio (TC ratio) and NMF throughout a season. Despite changes in self-reported fatigue and soreness, no significant alterations were found in the TC ratio or CMJ factor scores. Linear mixed models (LMMs) indicated that CMJ measures might not fully capture NMF nuances. Although there were significant changes in self-reported fatigue and salivary biomarkers over time, no significant associations with NMF were detected. These findings suggest the need for more comprehensive assessments to detect Non-Functional Overreaching (NFOR), as NMF alone may not be sufficient. Additionally, we examined the relationship between NFOR-induced NMF and traumatic Lower Extremity Injuries (LEIs). Analyzing CMJ data over four seasons, we aimed to construct a model for traumatic LEIs, considering various covariates. Results showed differences in baseline CMJ performances between injured and uninjured athletes, with those later suffering LEIs demonstrating greater baseline CMJ performances in certain groups. Our analysis revealed insights, including reduced odds of traumatic LEI over time and increased odds associated with
NFOR. In conclusion, these studies highlight the importance of monitoring NFOR-induced changes in neuromuscular performance to assess injury risk. The findings underscore the need for standardized assessment protocols and larger, more diverse samples to better understand the longitudinal association between NFOR and traumatic LEIs in this population.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
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| ETD Committee: |
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| Date: |
10 July 2024 |
| Date Type: |
Publication |
| Defense Date: |
14 May 2024 |
| Approval Date: |
10 July 2024 |
| Submission Date: |
6 June 2024 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
140 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
School of Health and Rehabilitation Sciences > Sports Medicine and Nutrition |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Neuromuscular Fatigue, Overtraining |
| Date Deposited: |
10 Jul 2024 15:02 |
| Last Modified: |
10 Jul 2024 15:02 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/46488 |
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