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Quantitative EMG changes during 12-week DeLorme's axiom strength training
Hwa-Kyung Shin1, Sang-Hyun Cho, Young-Hee Lee
1Department of Occupational Therapy, Kaya University, College of Health Science, Goryeong-gun, Gyeongbuk 717-800, Korea. hkshin1@kaya.ac.kr
Yonsei Medical Journal
|February 28, 2006
Summary
Surface electromyography (EMG) effectively monitors muscle changes during strength training. Integrated EMG and median frequency variables track physiological adaptations in muscles undergoing training, whether static or dynamic.
Area of Science:
- Sports Science
- Biomedical Engineering
- Physiology
Background:
- Strength training is crucial in physical therapy and sports but lacks precise methods to evaluate muscle response.
- Surface electromyography (EMG) offers a potential non-invasive technique to assess muscle adaptations.
Purpose of the Study:
- To investigate if surface EMG data from isometric and isotonic exercises can detect muscle changes during a 12-week strength training program.
- To validate integrated EMG and median frequency variables as indicators of muscle adaptation.
Main Methods:
- Ten healthy male students participated, with five in a 12-week strength training group and five as controls.
- Measurements included 1 repetition maximum, maximal voluntary isometric contraction, surface EMG (integrated EMG, median frequency), and limb circumference at baseline and throughout the training period.
Main Results:
- The training group showed significant increases in muscle strength and limb circumference.
- Both integrated EMG and median frequency demonstrated significant linear increases during training for both contraction types.
- These EMG variables successfully correlated with physiological muscle changes.
Conclusions:
- Surface EMG, specifically integrated EMG and median frequency, can effectively monitor electrophysiological changes in muscles during strength training.
- These methods are applicable regardless of whether the muscle contraction is static or dynamic.