무릎 각도에 따른 교각운동 시 복부 드로잉-인 기법과 엉덩관절 모음이 복부 근두께에 미치는 영향 = Effects of Abdominal Drawing-In Technique and Hip Joint Adduction on Abdominal Muscle Thickness during Bridge Exercise according to Knee Angle

다국어 초록 (Multilingual Abstract)

Purpose: This study was conducted to determine whether there are changes in the muscle thickness of theTransversus abdominis, Internal oblique, and External oblique muscles by applying the abdominal drawing-inwhile maintaining hip joint adduction using ultrasound.
Methods: Thirty healthy adult men and women in their 20s located in J City were selected for the study. Theparticipants performed the bridge posture while maintaining hip joint adduction, with the knee joint bendingangle was set to 90° and 120°, and the abdominal drawing-in applied. The exercises were performed threetimes a week for a total of four weeks, and after applying exercise, the thickness of the Transversus abdominis,Internal oblique, and External oblique muscles were measured using ultrasound. After applying the exercise,the paired t-test was used to compare the effects of individual exercise training, and the independent t-testwas used to compare the differences of each group.
Results: The significance level was set at α<0.05. As a result of the study, the muscle thickness of the Internaloblique significantly increased during the 90˚ flexion of the knee joint (p>.05). Internal and External obliquemuscle thickness significantly increased during the 120˚ flexion of the knee joint (p>.05).
Conclusion: When the knee joint angle is 90° and 120°, with the bridge exercise in place, and the abdominal drawing-inapplied, back pain can be prevented by selectively activating the Internal oblique External oblique muscles.