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KMID : 1211620200150010055
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Journal of the Korean Society of Physical Medicine
2020 Volume.15 No. 1 p.55 ~ p.63
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Effects of Handgrip Exercise on the Shoulder Muscle Activation and Cross-Sectional Area of the Supraspinatus Muscle in Rotator Cuff Repair Patient
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Lee Dong-Rour
Choi Young-Eun
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Abstract
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PURPOSE: This study examined the effects of handgrip exercise, which was started two weeks after surgery for shoulder rotator cuff repair, on the extent of muscle activation around the shoulder and the cross-sectional area of the supraspinatus muscle.
METHODS: Among patients diagnosed with rotator cuff rupture by an orthopedic surgeon and rotator cuff repair was performed using an arthroscope, 28 were selected as subjects. These subjects were allocated randomly to the experimental group and control group with 14 subjects in each group. An electromyogram was measured as a measure of the extent of muscle activation around the shoulder for a total of six times (%RVC). The cross-sectional area of the supraspinatus muscle was measured before and after the rotator cuff repair by magnetic resonance imaging.
RESULTS: The extent of muscle activation in accordance with time in both the experimental group and control group displayed significant differences in various muscles including the anterior deltoid, pectoralis major, upper trapezius and infraspinatus muscle(p<.05). A significant difference in the variation of the cross-sectional area of the supraspinatus muscle was observed between the experimental group and the control group(p<.05).
CONCLUSION: Handgrip exercise helps rehabilitate the shoulder joint at the acute stage after rotator cuff repair when
assertive exercise therapy cannot be applied.
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KEYWORD
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Handgrip exercise, Rotator cuff repair, Supraspinatus, Muscle cross-sectional area
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