Comparison of Muscle Activity During a Push-up on a Suspension Sling and a Fixed Support

슬링(sling)과 고정된 지지면에서의 팔굽혀펴기 동작 시 근 활성도 비교

  • Oh, Jae-Seop (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Park, Jun-Sang (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University) ;
  • Kim, Suhn-Yeop (Dept. of Physical Therapy, College of Health Science, Catholic University of Pusan) ;
  • Kwon, Oh-Yun (Dept. of Physical Therapy, College of Health Science, Yonsei University, Dept. of Ergotherapy, The Graduate School of Health and Environment, Yonsei University, Institute of Health Science, Yonsei University)
  • 오재섭 (연세대학교 대학원 재활학과) ;
  • 박준상 (연세대학교 대학원 재활학과) ;
  • 김선엽 (부산가톨릭대학교 보건과학대학 물리치료학과) ;
  • 권오윤 (연세대학교 보건과학대학 물리치료학과, 보건환경대학원 인간공학치료학과, 보건과학연구소)
  • Published : 2003.09.17

Abstract

The purpose of this study was to compare the muscle activity during a push-up on a suspension sling and a fixed support at the same level. Tests were performed on 15 male subjects. Electromyography using a surface EMG recorded the activity of the triceps, pectoralis major, and internal and external oblique muscles during each push-up. EMG activity was recorded at 0, 45, and 90 degrees of elbow flexion in the push-up position on a suspension sling or a fixed support at the same height above the floor (30 cm). The testing order was selected randomly. The subjects were asked to maintain the push-up position with straight knees, hips, and trunk for 5 seconds at each elbow angle. The mean root mean square (RMS) of EMG activity was calculated. EMG activity was normalized using the maximum voluntary isometric contractιn elicited using a manual muscle testing technique. Two-factor repeated measures analysis of variance (ANOVA) was used to compare the average RMS value of EMG activity for each condition. The EMG activity for the pectoralis major, and internal and external oblique muscles during a push-up on a sling was significantly higher than on a fixed support at all angles of elbow flexion (p<.01). There were significant differences in the EMG activity of the pectoralis major and triceps brachii muscles at difference angles of elbow flexion (p<.05). The pectoralis major muscle had the highest EMG activity at 90 degrees of elbow flexion on both the sling and fixed support. The triceps brachii muscle had the highest EMG activity at 45 degrees of elbow flexion on both the sling and fixed support. The internal and external oblique muscles had the highest EMG activity at 0 degrees of elbow flexion, although the difference with angle of flexion was not significant. These results suggest that to improve proximal and trunk stability and muscle strength, push-ups are more useful when performed on a suspension sling than On a fixed support.

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Acknowledgement

Supported by : 한국과학재단