Seventeen volunteer subjects with SDRS were recruited from university populations. They are also called "the boxer's muscle". The more accurate description of upward rotation is coupled motion between the middle trapezius and serratus anterior with stabilization provided by the lower trapezius. Choosing Exercises to Target Shoulder Muscles B. The traditional description of upward rotation is “synchronous contraction of the upper trapezius, lower trapezius, and serratus anterior.” However, this description is not accurate. Illyés, A. The traditional description of upward rotation is “synchronous contraction of the upper trapezius, lower trapezius, and serratus anterior.” However, this description is not accurate. Direct 3-dimensional measurement of scapular kinematics during dynamic movements in vivo. Journal of Orthopaedic and Sports Physical Therapy, 39. I believe this is the most extensive article ever written about it, and every piece of advice presented in this article will be practical. The muscles that encourage or maintain upward rotation are the Upper Trapezius, the Middle Trapezius, the Lower Trapezius, and the Serratus Anterior. Upper trapezius produces clavicular elevation and retraction. Serratus Shrugs: 5 sets of 5 to 15 repetitions. Do them enough and you might feel a nice serratus anterior burn you have never felt before. The aim of this research was to compare muscle activation levels during the standard shrug and the upward rotation shrug in a normal and pathological population. He recently co-edited two textbooks and is serving as an associate editor for the International Journal of Athletic Therapy and Training.