Activation of supraspinatus and infraspinatus neuromuscular partitions during elastic resistance exercises

This study investigated EMG activation of the neuromuscular partitions of supraspinatus and infraspinatus during external rotation and abduction tasks against elastic resistance. Twenty-two participants completed dynamic arm movements using Theraband™ elastics while EMG activity from two partitions of each muscle was collected. When timing of peak activity was assessed as a percentage of the overall movement, significant differences between the partitions of supraspinatus were found. Findings add to a growing body of literature, providing a better understanding of the functions and relationships of the neuromuscular partitions of supraspinatus and infraspinatus.