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KMID : 1211620140090010124
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Journal of the Korean Society of Physical Medicine
2014 Volume.9 No. 1 p.124 ~ p.132
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Effects of the Trunk and Neck Extensor Muscle Activity According to Leg Positionon in Bridging Exercise
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조현래:Cho Hyun-Rae
정다은:Jung Da-Eun/채정병:Chae Jung-Byung
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Abstract
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PURPOSE : This study aims to determine the optimal knee joint angle and hip joint angle for minimizing the cervical muscle tension and maximizing the muscle activity of the trunk during the bridging exercise for trunk stabilization.
METHODS : The bridging exercise in this study included seven forms of exercise: having a knee joint flexion angle of 120°, 90°, 60°, 45° and hip joint abduction angle of 15°, 10°, 5°. The posture of the bridging exercise was as follows. To prevent the increase of hyper lumbar lordosis during the bridging exercise, the exercise was practiced after maintaining the lumbar neutral position through the pelvic posterior tilting exercise.
RESULTS : The abduction angles did not result in statistically significant effects on the cervical erector, external oblique, rectus abdominis and erector spinae muscles. However, in relation to the knee joint angles, during the bridging exercise, statistically significant results were exhibited.
CONCLUSION : The knee joint angle affected the muscle activity of the neck muscle. The greater the knee joint angle, the lower the load placed on the neck muscle. In contrast, the load increased as the knee joint angle decreased. In addition, the muscle activity of the neck muscle and trunk muscle increased as the knee joint angle decreased.
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KEYWORD
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Bridging exercise, Knee joint angle, Hip joint abduction angle, Muscle activity
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