Physical Therapy Rehabilitation Science

korean Academy of Physical Therapy Rehabilitation Science (물리치료재활과학회)
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Changes in muscle activity of the abdominal muscles according to exercise method and speed during dead bug exercise

  • Yun, Byeong-Gwon (Department of Physical Therapy, VHS Medical Center) ;
  • Lee, Seung-Joo (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University) ;
  • So, Hyun-Jeong (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University) ;
  • Shin, Won-Seob (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University)
  • Received : 2017.02.27
  • Accepted : 2017.03.13
  • Published : 2017.03.30
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Abstract

Objective: There are many types of exercises with upper and lower-limb action for activation of abdominal muscles for trunk stabilization. A comparison of the different exercise methods been very useful to enhance the result from the exercise for treatment. The purpose of this study was to investigate through surface electromyography (EMG) the changes in abdominal muscle activity during the performance of three different dead-bug exercise methods performed at three different speeds. Design: Cross-sectional study. Methods: The subjects were 30 healthy adults (13 males and 17 females). We instructed the subjects to perform three different dead-bug exercises. We also applied three different speeds to the dead-bug exercises; 60 bpm, 90 bpm, and 120 bpm with use of a metronome. The assessment of EMG was percentage of maximal voluntary isometric contraction on the rectus abdominis (RA), external oblique (EO), and internal oblique (IO). Results: EMG activation of the RA, EO and IO muscles was significantly greater at the higher speed (p<0.05). There was a significant increase in abdominal muscle activity during the dead-bug exercise performed with both the upper and lower extremities compared to that with only the upper extremity or the lower extremities (p<0.05). Conclusions: These findings demonstrate that the performance of the dead-bug exercise with both the upper and lower extremities combined at a high speed is more effective compared to other exercises. Therefore, it is suggested that more favourable and effective outcomes may occur when the type and speed of the exercise is chosen appropriately.

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References

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