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KMID : 1035420190070030197
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Journal of The Korean Society of Integrative Medicine
2019 Volume.7 No. 3 p.197 ~ p.204
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Effect of Support Surface Form on Abdominal Muscle Thickness During Flank Exercise
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Kim Hyeon-Su
Lee Keon-Cheol
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Abstract
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Purpose: This study aimed to investigate the effects of flank exercise on the thickness of the abdominal muscles (transverse abdominis and external and internal obliques), which was measured with ultrasound.
Methods: The subjects were divided into the two groups and performed flank exercise on a stable surface (stable surface group) and an unstable surface (unstable surface group). A mat was used as a stable surface, and an air cushion (TOGU) used as a unstable surface. Both groups were asked to hold a flank for 45 seconds and to complete 3 sets of the flank exercise with 3 reps per set and a 45-second rest period between sets. The exercise training was conducted three times per week for 4 weeks.
Results : In both stable and unstable surface, the thickness changes of the transverse abdominis and external and internal oblique muscle increased (p<.05). In the unstable surface, there was a greater increase in the thickness change of the transverse abdominis and external oblique muscles in the flank exercise than in the stable surface (p.<05). Among them, the greatest increase was found in the external abdominal muscle (p<.05).
Conclusion : This study found that the flank exercise was more effective in strengthening the abdominal muscles on an unstable surface, when compared with the outcomes on a stable one. It is also thought to have the most effect on the muscle activity of the external oblique muscle on unstable surface.
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KEYWORD
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abdominal muscles, flank exercise, muscle thickness, support surface
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