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Updated: Feb 11, 2026
12:59
Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
Published on: July 5, 2017
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Relationships between muscle strength and multi-channel surface EMG parameters in eighty-eight elderly.
Kohei Watanabe1, Motoki Kouzaki2, Madoka Ogawa3,4
11Laboratory of Neuromuscular Biomechanics, School of International Liberal Studies, Chukyo University, Yagotohonmachi, Showa-ku, Nagoya, 466-8666 Japan.
Summary
Muscle strength loss in older adults is not just due to muscle size. Neuromuscular activation patterns, measured by surface electromyography (EMG) amplitude, also significantly contribute to elderly muscle strength.
Area of Science:
- Gerontology
- Biomedical Engineering
- Kinesiology
Background:
- Age-related muscle strength decline is multifactorial, extending beyond muscle atrophy.
- Understanding determinants of muscle strength in the elderly is crucial for maintaining function and independence.
Purpose of the Study:
- To investigate the contribution of neuromuscular activation patterns to muscle strength in elderly individuals.
- To identify key parameters of surface electromyography (EMG) that correlate with muscle strength in older adults.
Main Methods:
- Eighty-eight elderly participants (aged 61-83 years) underwent multi-channel surface EMG recordings of the vastus lateralis muscle during isometric knee extension.
- Analysis included correlation and stepwise regression between muscle strength and EMG parameters like root mean square (RMS), correlation coefficient, and modified entropy.
Main Results:
- Muscle strength showed a significant correlation with RMS (r=0.361, p=0.001).
- Stepwise regression identified muscle thickness (r=0.519), RMS (r=0.288), and normalized RMS (r=0.177) as major determinants of muscle strength (R=0.664).
Conclusions:
- Surface EMG amplitude partially explains inter-individual differences in muscle strength among the elderly.
- Neuromuscular activation patterns are significant determinants of elderly muscle strength, complementing muscle volume indicators.
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