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KMID : 1206220210280020019
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Journal of Korean Academy of Physical Therapy Science
2021 Volume.28 No. 2 p.19 ~ p.29
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The effects of pulsed ultrasound and continued ultrasound intervention before an exercise on maximal voluntary isometric contraction and range of motion of exercise-induced muscle damage
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Kim Ha-Neul
Jeon Jae-Geun
Shin Sung-Phil
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Abstract
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Background: The purpose of this study was to investigate the effects of pulsed-ultrasound intervention and continued-ultrasound on the MVIC (maximal voluntary isometric contraction) and active ROM (range of motion) recovery of before EIMD (exercise-induced muscle damage).
Design: Randomized controlled trial.
Methods: Thirty subjects who are student in their 20s at a university participated in this study, these subjects were assigned into three groups, a control group (n=10), experiment groupⅠ(n=10) and experiment groupⅡ(n=10). The subjects in experimental group were intervened by pulsed-ultrasound and continued-ultrasound, while ones on control group weren’t by any intervention after induced EIMD.
Results: First, In comparison of the MVIC, in the among group comparison, the MVIC of continued-ultrasound group was significantly larger than those of other groups (p<.005). Second, In the among group comparison, the active extension angle of continued-ultrasound group was significantly smaller than those of other groups (p<.005). Third, In the among group comparison, the active flexion angle of continued-ultrasound group was significantly lager than those of other groups (p<.05).
Conclusion: The above results revealed that the continued-ultrasound intervention before an exercise had a significantly improve of muscle function after EIMD. Therefore we can consider the continued ultrasound as a considerable intervention method to prevent or reduce an exercise injury.
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KEYWORD
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Exercise-induced muscle damage, Maximal voluntary isometric contraction, Pulsed-ultrasound, Range of motion
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