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Effects of Posture Correction Exercise on Muscle Activity and Onset Time during Arm Elevation in Subject with Forward Head and Rounded Shoulder Posture

대한물리의학회지 2020년 15권 3호 p.29 ~ 41
박선욱, 이한숙,
소속 상세정보
박선욱 ( Park Sun-Wook ) - Samsung Medical Center Department of Physical Therapy
이한숙 ( Lee Han-Suk ) - Eulji University Department of Physical Therapy

Abstract


PURPOSE: The aim of this study was to provide evidence for the treatment of Forward Head and Rounded Shoulder Posture (FHRSP) using posture correction exercises by comparing muscle activity and onset time around the neck and shoulder area during an arm elevation task.

METHODS: The subjects were divided into FHRSP (21 persons) and non-FHRSP (19 persons) groups to measure muscle activity and onset time of muscle contraction. Wireless surface electromyography was used to assess the muscle activity and onset time of the right and left sternocleidomastoid (SCM), splenius capitis, anterior deltoid, middle deltoid, serratus anterior, upper trapezius, pectoralis major, and infraspinatus during an arm elevation task. After the pre-measurement, the participants performed the postural correction exercises, and then the postmeasurement was conducted.

RESULTS: After the posture correction exercises, there were significant differences in the muscle activity and onset time of all muscles in the FHRSP group. The results of the comparison of the muscle onset time during an arm elevation task demonstrated that after the postural correction exercises, the muscle onset time was significantly reduced in the right and left SCM and left splenius capitis, but there were no significant changes in the onset time of other muscles.

CONCLUSION: The results of this study help us understand the change in muscle activities and muscle contraction onset time in a person with FHRSP when lifting the arm and suggest the relevant basis to apply the posture correction exercise in clinical settings.

키워드

Forward head; Muscle activity; Onset time; Postural correction; Rounded shoulder

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