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Knee Flexion Angles Influence Hip Extensor Activity During Prone Heel Squeeze

한국전문물리치료학회지 2014년 21권 4호 p.15 ~ 22
정효정, 이지현, 최우정, 신헌석,
소속 상세정보
정효정 ( Jeong Hyo-Jung ) - Yonsei University Graduate School Department of Physical Therapy
이지현 ( Lee Ji-Hyun ) - Yonsei University Graduate School Department of Physical Therapy
최우정 ( Choi Woo-Jung ) - Yonsei University Graduate School Department of Physical Therapy
신헌석 ( Cynn Heon-Seock ) - Yonsei University Graduate Shool of Health Science Department of Physical Therapy

Abstract


The purpose of this study was to determine the muscle activities of the erector spinae (ES), gluteus maximus (Gmax), gluteus medius (Gmed), and the hamstring (HAM) and the ratios of Gmax/ES,Gmax/HAM, and Gmed/HAM during the prone heel squeeze (PHS) with different knee flexion angles (45°, 90°, and 135°). Fifteen young and healthy subjects (8 men, 7 women) were recruited for the study. Surface electromyography signals were collected on ES, Gmax, Gmed, and HAM during PHS. A separate one-way analysis of variance with repeated measures was used to determine the significance of the muscle activities of ES, Gmax, Gmed, and HAM and the ratios of Gmax/ES, Gmax/HAM, andGmed/HAM with different knee flexion angles during PHS. There was a significant increase in the Gmax activity at the knee flexion of 90° in comparison with that of the 45° (p=.016). There were significant increases in the Gmed activity at the knee flexion of 90° (p=.008) and 135° (p=.006) in comparison with that of the 45°. There were significant decreases in the HAM activity at the knee flexion of 90° (p=.009) and 135° (p=.004) in comparison with that of the 45°. There were significant increases in the Gmax/HAM muscle activity ratio at the knee flexion of 90° (p=.007) and 135° (p=.012) in comparison with that of the 45°. There were significant increase in the Gmed/HAM muscle activity ratio at the knee flexion of 135° in comparison with that of the 45° (p=.008). The knee flexion of 90° during PHS can induce decreasing activity of HAM and increasing activity of Gmax, and the knee flexion of 135° during PHS can induce decreasing activity of HAM and increasing activity of Gmed. Hence, PHS with different knee flexion positions could be considered for the different

키워드

Electromyography; Hip extensor muscles;; Prone heel squeeze

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