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Validation of a simplified method for muscle volume assessment
Falk Mersmann1, Sebastian Bohm1, Arno Schroll1
1Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Germany.
Journal of Biomechanics
|March 11, 2014
Summary
This study validates a simplified method for assessing triceps surae (TS) muscle volume using anatomical cross-sectional area and muscle length. The findings show this method is accurate and sensitive for detecting muscle changes in various populations.
Area of Science:
- Biomechanics
- Human Physiology
- Musculoskeletal Imaging
Background:
- Accurate muscle volume assessment is crucial for understanding physiological changes.
- Previous methods for muscle volume calculation can be complex and time-consuming.
- A simplified approach could improve efficiency and accessibility in research and clinical settings.
Purpose of the Study:
- To validate a simplified muscle volume assessment method for the triceps surae (TS) muscles.
- To determine the accuracy of using maximum anatomical cross-sectional area (ACSAmax), muscle length (LM), and a shape factor for muscle volume calculation.
- To assess the method's validity across different training populations.
Main Methods:
- Muscle volume, ACSAmax, LM, and shape factors were calculated from MRI reconstructions of soleus (SO), gastrocnemius medialis (GM), and gastrocnemius lateralis (GL) muscles in untrained, endurance, and strength-trained athletes.
- Shape factors derived from the first group were applied to an independent group of recreationally active individuals.
- Muscle volume from the simplified method was compared to whole muscle reconstructions.
Main Results:
- Despite significant differences in muscle dimensions across training groups, shape factors for SO, GM, and GL were consistent (averaging 0.497, 0.596, and 0.556, respectively).
- The simplified method showed no significant differences compared to whole muscle reconstructions in the independent group.
- Root mean square differences were 7.9% (SO), 4.8% (GM), and 8.3% (GL).
Conclusions:
- The simplified muscle volume assessment method, utilizing ACSAmax, LM, and established shape factors, is valid for the triceps surae muscles across diverse populations.
- This method is sufficiently sensitive to detect muscle volume alterations associated with degeneration, atrophy, or hypertrophy.
- The findings support the use of this simplified approach for efficient and reliable muscle volume quantification.
