Scapular kinematic and shoulder muscle activity alterations after serratus anterior muscle fatigue

Journal of Shoulder and Elbow Surgery
Jun UmeharaNoriaki Ichihashi

Abstract

Although the serratus anterior muscle has an important role in scapular movement, no study to date has investigated the effect of serratus anterior fatigue on scapular kinematics and shoulder muscle activity. The purpose of this study was to clarify the effect of serratus anterior fatigue on scapular movement and shoulder muscle activity. The study participants were 16 healthy men. Electrical muscle stimulation was used to fatigue the serratus anterior muscle. Shoulder muscle strength and endurance, scapular movement, and muscle activity were measured before and after the fatigue task. The muscle activity of the serratus anterior, upper and lower trapezius, anterior and middle deltoid, and infraspinatus muscles was recorded, and the median power frequency of these muscles was calculated to examine the degree of muscle fatigue. The muscle endurance and median power frequency of the serratus anterior muscle decreased after the fatigue tasks, whereas the muscle activities of the serratus anterior, upper trapezius, and infraspinatus muscles increased. External rotation of the scapula at the shoulder elevated position increased after the fatigue task. Selective serratus anterior fatigue due to electric muscle stimulation decreased t...Continue Reading

Citations

Jul 4, 2019·Medicine and Science in Sports and Exercise·Benoit GilletMickaël Begon
Aug 23, 2020·Current Reviews in Musculoskeletal Medicine·Sundeep S SainiAlan S Curtis

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