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1Department of Rehabilitation Medicine, Queen's University, Kingston, Canada.
Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
Summary
Low back pain is linked to poor muscle endurance. New methods allow comparable muscle testing in patients and healthy individuals, improving research on muscular deficiencies and back pain.
Area of Science:
- Biomedical Engineering
- Clinical Biomechanics
- Musculoskeletal Research
Background:
- Epidemiological studies indicate a correlation between reduced muscular endurance and the prevalence of low back pain.
- Advancements in surface electromyography (sEMG) and power spectrum analysis have revitalized interest in studying the electromyographic (EMG) signal during isometric muscle contractions.
- Existing methods for assessing muscle function in low back pain patients often involve maximal voluntary contractions, which can be challenging or uncomfortable for this population.
Purpose of the Study:
- To describe a novel technique for assessing sustained muscular contractions in individuals with chronic low back pain.
- To establish a method that elicits comparable constant force contractions in both chronic low back pain patients and healthy controls.
- To present an alternative to maximal voluntary contraction protocols, offering advantages for patient tolerance and data consistency.
Main Methods:
- Development and application of a specialized technique for surface electromyography (sEMG) signal acquisition during sustained sub-maximal isometric contractions.
- Utilizing power spectrum analysis of the sEMG signal to investigate muscle fatigue and neuromuscular activity.
- Implementing a constant force feedback system to ensure comparable contraction levels between patient and control groups.
Main Results:
- The described technique was found to be acceptable for chronic low back pain patients.
- Comparable constant force contractions could be reliably achieved in both patient and control groups.
- The method provides a viable alternative to maximal voluntary contraction tests, potentially yielding more consistent and comfortable data.
Conclusions:
- The developed technique offers a practical and well-tolerated approach for evaluating muscle function in chronic low back pain.
- This methodology facilitates more consistent and comparable electromyographic (EMG) data collection between individuals with and without low back pain.
- Further research utilizing this technique can advance our understanding of the relationship between muscular deficiencies and low back pain.
