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KMID : 1195020200160010085
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Archives of Orthopedic and Sports Physical Therapy
2020 Volume.16 No. 1 p.85 ~ p.91
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Effects of Unstable Support Surface and Weight Load on Muscle Activity and Balance During Squat Exercise
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Kim Hyeon-Su
Lee Keon-Cheol
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Abstract
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Purpose: The purpose of this study is to find and compare the differences between muscle activity changeand balance during unstable support and weight load during the squat exercise.
Methods: The subjects were 36 normal adults (18 male and 18 female). It was randomly divided into a stablesupport group (control group), an unstable support group (experimental group 1), and an unstable supportsurface weighted group (experimental group 2), and the squat exercise was performed for 4 weeks. Togujumper (TOGU, Germany) was applied as the unstable support surface, and 4 kg of Kettlebell (Schmidt, China)was applied for the weight load. The squat exercise was conducted three times a week and consisted of10 minutes of warm-up, 20 minutes of the main exercise, and 10 minutes of down exercise. This exercisewas repeated three sets of 15 squats.
Results: The result is as follows. First, changes in muscle activity according to the experimental periodincreased in both the stable and unstable support groups and the unstable support and the largest increasein the weight load group (p<.05). Second, change in the balance ability according to the experiment periodwas most improved in the unstable support according to the experiment period in the change of Endpointexcursion (EPE) and the Directional control (DCL) than the other two groups (p<.05).
Conclusion: Squat exercise is effective as an exercise to improve the strength and balance of leg muscles.
As in previous studies, it was found that exercise is more effective on the unstable support than on the stablesupport and that it is most effective to give weight load on the unstable support.
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KEYWORD
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Balance, Muscle activity, Squat exercise, Unstable support surface, Weight load
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