Abstract
PURPOSE:The objective of this study was to identify the effects of shoulder abduction strength and EMG activities of the selected scapular and shoulder muscles during isometric shoulder abduction.METHODS:Thirty-four healthy young females were recruited sfor this study. Surface EMG equipment with inline force sensor w as used to determine the shoulder abductor strength and the activ ity of the serratus anterior (SA), upper trapezius (UT), lower trapezius (LT), and middle deltoid (MD) during three shoe heel height conditions: (1) barefoot, (2) 3-cm shoe heel height, and (3) 7-cm shoe heel height.RESULTS:Isometric shoulder strength showed statisticallysignificant difference among the conditions (p<0.05), and post-hoctest showed lower strength during the 7-cm condition(49.98±17.56 kg) than during the barefoot (44.97±20.15 kg) and 3-cm conditions (36.59±17.07 kg). Furthermore, EMG
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