Earticle

초록

영어

Draw-in is a promising intervention for regaining isolated control of the transverse abdominis (TrA). Exercises to stimulate isolated contractions are needed; however, the appropriate methods are unclear. The objec-tives of this study were to examine how the muscle activity and muscle activity ratio of abdominal muscles change with various verbal instruc-tions and to determine the onset of the abdominal muscles during draw-in. The participants were 21 healthy men. TrA electromyography was performed using fine-wire electrodes, and the internal oblique (IO), ex-ternal oblique (EO), and rectus abdominis (RA) were determined using surface electrodes. The participants performed seven abdominal exer-cises according to verbal instructions and isolated voluntary contrac-tion of the TrA for more than 5 sec. The TrA showed higher activity in bracing. IO and EO activities were highest in bracing, whereas RA showed the highest activity in maximum bracing. TrA/IO and TrA/EO were not significantly different between conditions. The results of the onset activity analysis of the abdominal muscles during the draw-in maneuver showed that the TrA was significantly earlier than the other muscles. The activity ratios of TrA to IO and EO were highly individual-ized and did not differ according to the verbal instruction. Maximum draw-in showed more significant IO activity, and bracing showed co-contraction of the superficial and deep abdominal muscles. During draw-in, the TrA initiated the earliest activity among the abdominal muscles and then isolated activity for 1.1 sec.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
Design
Participants
Electromyography
Experimental procedure
Data analysis
Statistics
RESULTS
DISCUSSION
CONFLICT OF INTEREST
ACKNOWLEDGMENTS
REFERENCES

키워드

저자

• Tsuyoshi Morito [ Graduate School of Sports Sciences, Waseda University, Nishitokyo, Tokyo, Japan ]
• Hiroshi Akuzawa [ Institute for Human Movement and Medical Science, Niigata University of Health and Welfare, Niigata, Japan ]
• Yu Okubo [ Faculty of Health and Medical Care, Saitama Medical University, Iruma-gun, Saitama, Japan ]
• Gen Adachi [ Waseda Institute for Sport Sciences, Tokorozawa, Saitama, Japan ]
• Tomoki Oshikawa [ Faculty of Sport Sciences, Waseda University, Nishitokyo, Tokyo, Japan ]
• Koji Kaneoka [ Faculty of Sport Sciences, Waseda University, Nishitokyo, Tokyo, Japan ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  JER [Journal of Exercise Rehabilitation]

• 간기

  격월간

• pISSN

  2288-176X

• eISSN

  2288-1778

• 수록기간

  2013~2026

• 등재여부

  SCOPUS,KCI 등재

• 십진분류

  KDC 517 DDC 613