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[Effect of muscular work on the myosonogram]
C D Reimers1, H Lochmüller, N Goebels
1Friedrich-Baur-Institut, Klinikum Innenstadt, Ludwig-Maximilians-Universität, München.
Ultraschall in Der Medizin (Stuttgart, Germany : 1980)
|April 1, 1995
Summary
Muscle thickness increases with both static and dynamic exercise. Changes in muscle echo intensity vary based on the specific muscle and exercise type, showing decreases or increases.
Area of Science:
- Exercise physiology
- Musculoskeletal imaging
Background:
- Muscle thickness and echo intensity are key indicators of muscle status.
- Understanding exercise-induced changes is crucial for sports science and rehabilitation.
Purpose of the Study:
- To quantitatively assess changes in muscle thickness and echo intensity following various exercise types in healthy individuals.
- To investigate the relationship between exercise duration and muscle thickness changes.
Main Methods:
- 16 healthy volunteers performed static and dynamic exercises on specific leg and abdominal muscles.
- Muscle thickness was measured using an electronic caliper.
- Echo intensity was analyzed using computer-assisted gray-scale imaging before and after exercise.
Main Results:
- Isometric exercise increased muscle thickness by 5-18% (p < 0.01).
- Rectus femoris and vastus intermedius echo intensity decreased after isometric exercise (-8% to -26%, p < 0.01).
- Dynamic exercise increased rectus femoris/vastus intermedius muscle thickness (+12.5%, p < 0.01) and vastus intermedius echo intensity (+19.5%, p < 0.01).
Conclusions:
- Muscle thickness consistently increases during and after both static and dynamic exercise.
- Muscle echo intensity changes are variable, depending on the muscle group and exercise modality.