Auditory sEMG biofeedback for reducing muscle co-contraction during pedaling
Benio Kibushi1, Junichi Okada2
1Graduate School of Human Development and Environment, Kobe University, Kobe, Japan.
Physiological Reports
|May 25, 2022
Summary
Auditory surface electromyography biofeedback (sEMG-BF) did not improve muscle co-contraction during cycling. This study suggests that current sEMG-BF methods may need further development to enhance coordination and efficiency.
Area of Science:
- Biomechanics
- Motor Control
- Sports Science
Background:
- Muscle co-contraction, involving agonist and antagonist muscles, can decrease energy efficiency and disrupt movement.
- Surface electromyography biofeedback (sEMG-BF) is utilized for muscle activation and relaxation training, but its effect on reducing muscle co-contraction remains unclear.
Purpose of the Study:
- To investigate the effectiveness of auditory sEMG-BF in improving muscle co-contraction during cycling.
- To test the hypothesis that auditory sEMG-BF enhances muscle co-contraction.
Main Methods:
- Thirteen participants cycled under four auditory sEMG-BF conditions: no feedback, vastus lateralis (VL) feedback, semitendinosus (ST) feedback, and combined VL/ST feedback.
- Surface electromyography (sEMG) of lower limb muscles was recorded.
- The co-contraction index (COI) for knee and hip flexor-extensor muscles was compared across conditions.
Main Results:
- No significant differences in the co-contraction index (COI) were found among the different auditory sEMG-BF conditions for either knee (p=0.83) or hip (p=0.32) muscles.
- Individual muscle feedback did not lead to immediate improvements in muscle co-contraction during the pedaling task.
Conclusions:
- Auditory sEMG-BF, as applied in this study, does not immediately enhance muscle co-contraction during cycling.
- Future research may need to focus on converting muscle activation signals into co-contraction feedback for potential improvements.
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