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KMID : 1211620220170020021
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Journal of the Korean Society of Physical Medicine
2022 Volume.17 No. 2 p.21 ~ p.28
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Effect of Changes in Knee Angle and Weight-Shifting of the Sole on the Lower Extremity Muscle Activity during the Bridge Exercise
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Cho Hye-Jung
Lee Min-Woo
Bak Se-Young
Kim Hyeong-Dong
Shin Un-Chul
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Abstract
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PURPOSE: This study examined the effect of changes in the knee angle and weight shifting of the sole on the activity of the lower extremity muscles during bridge exercise.
METHODS: The subjects of this study included 20 healthy adult women (mean age 29.8 ± 4.32). The subjects performed the bridge exercise under three weight-shifting conditions general bridge (GB), hindfoot press bridge (HPB), and fore-foot bridge (FPB) and at two knee angles (90° and 60°).
During the bridge exercise, the activity of the quadriceps femoris (rectus femoris, vastus medialis oblique, and vastus lateralis) and biceps femoris muscles were measured using an electromyography sensor.
RESULTS: In the quadriceps femoris, the muscle activity of HPB and FPB was significantly higher than that of the GB at knee angles of 90° and 60° (p < .05). In the biceps femoris, the muscle activity increased significantly in the order of GB< HPB < FPB, and the knee angle increased significantly at 60° rather than at 90° (p < .05). There was no significant difference according to the knee angle in all muscles except for the biceps femoris.
CONCLUSION: These findings suggest that the weightshifting bridge of sole bridge exercise was more effective in increasing the activation of the lower extremity muscles than the GB.
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KEYWORD
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Bridge exercise, EMG, Lower extremity muscle activity, Weight-shifting
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