Abstract
The present project represents the second part of a two-phase clinical trial designed to comprehensively examine the effects of knee joint immobilization and recovery on skeletal muscle size, strength, and central nervous system plasticity in healthy males and females. The purpose of this study was to examine differences between sexes in the recovery of muscle quality, size, and strength in response to a resistance training-based rehabilitation program following one week of knee joint immobilization. Twenty-seven participants (males: n = 16, age = 22 ± 3 years, BM = 81.3 ± 14.8 kg, BMI = 25.0 ± 3.4 kg/cm2; females: n = 11, age = 20 ± 1 years, BM = 61.3 ± 9.4 kg, BMI = 23.3 ± 2.1 kg/cm2) underwent one week of knee joint immobilization followed by twice weekly resistance training sessions designed to re-strengthen the left knee joint. Retraining sessions were conducted until participants could reproduce their pre-immobilization isometric MVC peak torque. Assessments of muscle quality, size, and strength were conducted prior to immobilization (Pre-), immediately after immobilization (Post-Immobilization), and until retraining was finished (Post-Retraining). Results suggested that both sexes experienced negative changes in MVC peak torque, specific torque, echo intensity, and ECW/ICW ratio, with females experiencing greater decrements in MVC peak torque and specific torque. The number of retraining sessions required was similar for males (median = 1, mean = 2.13) and females (median = 2, mean = 2.91). Following retraining, specific torque was the only "muscle quality" indicator that had fully recovered. This is the first study to examine sex differences in the recovery of muscle quality indices in response to a retraining program following lower-limb immobilization. The findings may have important implications for the development of evidence-based, sex-specific rehabilitation approaches following short-term knee joint immobilization.
Notes
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Graduation Date
2022
Semester
Summer
Advisor
Stock, Matt
Degree
Doctor of Philosophy (Ph.D.)
College
College of Community Innovation and Education
Department
Learning Sciences and Educational Research
Degree Program
Education; Exercise Physiology
Identifier
CFE0009176; DP0026772
URL
https://purls.library.ucf.edu/go/DP0026772
Language
English
Release Date
August 2022
Length of Campus-only Access
None
Access Status
Doctoral Dissertation (Open Access)
STARS Citation
Girts, Ryan, "Sex Based Differences in Muscle Quality Recovery Following One Week of Lower Limb Immobilization and Subsequent Retraining" (2022). Electronic Theses and Dissertations, 2020-2023. 1205.
https://stars.library.ucf.edu/etd2020/1205