Effects of the Symmetry of Muscle Activity by Application of Visual Feedback using Tension Sensor and Inclinometer during Bridge Exercise with Sling

슬링을 이용한 교각운동 시 장력센서와 경사계를 이용한 시각적 피드백이 근활성도에 미치는 영향

  • Kwon, Yu-Jeong (Dept. of Physical Therapy, Dong-Eui Institute of Technology) ;
  • Song, Min-Young (Dept. of Physical Therapy, Dong-Eui Institute of Technology)
  • 권유정 (동의과학대학교 물리치료과) ;
  • 송민영 (동의과학대학교 물리치료과)
  • Received : 2021.01.15
  • Accepted : 2021.02.05
  • Published : 2021.02.28


Purpose: This study aimed to compare the relative muscle activity on the erector spinae, gluteus maximus, and hamstring, using a non-visual feedback bridge exercise and a visual feedback bridge exercise with a tension sensor and clinometer. Methods: Twenty-two healthy subjects participated in this study. The study subjects performed bridge exercises without visual feedback, bridge exercises using a tension sensor, and bridge exercises using an inclinometer in the supine position, and the muscle activity of the left and right erector spinae, gluteus maximus, and hamstring muscles was measured while maintaining isometric contraction during the bridge movement. Muscle activity was measured by using surface an electromyography equipment. To standardize the measured action potential of each muscle, the maximum voluntary isometric contraction was measured. The bridge exercise was repeated 3 times for 5s each. Using repeated analysis of variance, we compared the significant difference in EMG activity for each muscle between the three experiments, and all statistical processing was performed using SPSS version 26. The statistical significance level was set at α = 0.05. Results: During bridging exercises, the asymmetry of the muscle activity of the erector spinae and gluteus maximus during visual feedback guiding was lower than that during no visual feedback. However, there was no significant difference. Moreover, the asymmetry of the muscle activity of the hamstring muscles was significantly lower during tension sensor visual feedback than that during no visual feedback (p<0.05). Conclusion: These findings suggest that bridge exercise with visual feedback using a tension sensor and an inclinometer is effective in inducing symmetrical movement. When it is necessary to symmetrically adjust the weight load of both feet during the bridge exercise, it is effective to apply visual feedback using a tension sensor.


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