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Acute Changes in Muscle Thickness and Quality Following Dynamic Bodyweight Exercise in Recreationally Trained Adults
Kathleen R Dondero1, Dakota T Siok1, Hannah A Zabriskie1
1Department of Kinesiology, Towson University, Towson, MD, USA.
Journal of Sport Rehabilitation
|March 25, 2025
Summary
Ultrasound measures of muscle thickness (MT) showed faster recovery after exercise than muscle quality (MQ) and strength. Muscle quality (MQ) may be useful for monitoring muscle recovery in rehabilitation programs.
Area of Science:
- Exercise Physiology
- Musculoskeletal Imaging
- Rehabilitation Science
Background:
- Musculoskeletal ultrasound is a reliable tool for measuring muscle morphology.
- Limited research exists on its use for assessing acute exercise-induced changes in active populations.
Purpose of the Study:
- To assess changes in ultrasound-derived muscle thickness (MT) and muscle quality (MQ) after a single bout of high-intensity bodyweight exercise.
- To evaluate acute and post-acute recovery within 24 hours.
Main Methods:
- An interventional study involving 19 healthy, recreationally active participants.
- Ultrasound imaging of the rectus femoris (resting and contracted) pre-exercise, 15 minutes, and 24 hours post-exercise.
- Assessment of knee-extensor strength and muscle quality (MQ).
Main Results:
- Muscle thickness (MT) increased acutely post-exercise, returning to baseline at 24 hours.
- Muscle quality (MQ) and knee-extensor strength decreased acutely and remained below baseline at 24 hours.
- Changes in muscle thickness (MT) alone suggested faster recovery than strength or MQ.
Conclusions:
- Muscle thickness (MT) measures indicate a quicker recovery from exercise than strength or muscle quality (MQ).
- Muscle quality (MQ) may serve as a valuable metric for longitudinal monitoring of muscle recovery in rehabilitation settings.
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