MUSCLE STRENGTH AND ELECTROMYOGRAPHY ANALYSIS OF THE NECK DURING CHIN-IN POSTURE

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  • ICHIKI YASUTOSHI
    Department of Sport Rehabilitation, Division of PT & OT Sciences Graduate School of Health Sciences, Hiroshima University
  • URABE YUKIO
    Department of Sport Rehabilitation, Division of PT & OT Sciences Graduate School of Health Sciences, Hiroshima University
  • IDE KAZUSHIGE
    Division of Physical Therapy, Institute of Health Sciences Faculty of Medicine, Hiroshima University
  • AKIMOTO TAKESHI
    Division of Physical Therapy, Institute of Health Sciences Faculty of Medicine, Hiroshima University
  • KAGIMORI AYA
    Department of Sport Rehabilitation, Division of PT & OT Sciences Graduate School of Health Sciences, Hiroshima University

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Other Title
  • チンイン姿勢時の頚部筋力と筋活動
  • チンイン シセイジ ノ ケイブ キンリョク ト キン カツドウ

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Abstract

Injuries of the cervical spine occur in contact sports. Generally, muscle strengthening training of the neck is performed to prevent injuries of the cervical spine. Isometric resistance training with chin-in posture exercise is recommended for strengthening the neck. However, muscle strength and electromyography(EMG)date for chin-in posture have not been reported. The purpose of this study was to validate muscle strength and EMG testing during chin-in posture. Subjects were fifteen healthy men without pathological conditions in the neck. Muscle strength date and EMG measurements were taken for maximal voluntary isometric contraction(MVIC)flexion and extension actions during normal and chin-in posture. Subjects performed MVIC using a handheld dynamometer and surface EMG was recorded sternocleidomastoid, scalenus, upper trapezius, and splenius muscles. Results of chin-in posture showed a significant increase in muscle strength and EMG of all muscles. These results indicate the beneficial effect of chin-in posture which can increase muscle strength and prevent injuries of the neck.

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