Skip Navigation LinksHome > September 2011 - Volume 21 - Issue 5 > Scapular Muscle Activity in Overhead and Nonoverhead Athlete...
Clinical Journal of Sport Medicine:
doi: 10.1097/JSM.0b013e31822179e8
Original Research

Scapular Muscle Activity in Overhead and Nonoverhead Athletes During Closed Chain Exercises

Tucker, W Steven PhD, ATC; Bruenger, Adam J PhD, CSCS; Doster, Carrie M MS, ATC; Hoffmeyer, Donna R MSS, BSN, ACSM-HFS

Collapse Box


Objective: To compare scapular muscle activity in healthy overhead and nonoverhead athletes.

Design: One between (group) and 1 within (exercise) repeated measures.

Setting: Controlled laboratory environment.

Participants: Fifteen overhead sport athletes (10 women and 5 men) and 15 nonoverhead sport athletes (10 women and 5 men).

Interventions: Subjects completed 5 individual trials of a Cuff Link, standard push-up, and supine pull-up while surface electromyography (EMG) recorded muscle activity of 4 scapular muscles on the throwing dominant side. Mean EMG data were normalized to a maximum voluntary isometric contraction.

Main Outcome Measures: Normalized mean EMG.

Results: The upper trapezius was significantly more active (F2,56 = 70.118; P < 0.001) during supine pull-up (61.57 ± 29.67%) than during push-up (27.89 ± 16.21%) and Cuff Link (5.50 ± 2.94%). The middle trapezius was significantly more active (F2,56 = 134.192; P < 0.001) during supine pull-up (62.89 ± 24.17%) than during push-up (21.12 ± 13.10%) and Cuff Link (6.59 ± 4.81%). The lower trapezius was significantly more active (F2,56 = 41.326; P < 0.001) during supine pull-up (60.47 ± 34.80%) than during push-up (34.80 ± 30.81%) and Cuff Link (9.67 ± 4.34%). For upper trapezius, middle trapezius, and lower trapezius, the levels of activation during push-up were significantly greater compared with those during Cuff Link. The serratus anterior was significantly more active (F2,56 = 25.652; P < 0.001) during push-up (49.97 ± 18.86%) and Cuff Link (43.81 ± 19.70%) than during supine pull-up (25.52 ± 19.80%). There were no significant influences of group on muscle activation.

Conclusions: Overhead and nonoverhead athletes elicited similar levels of muscle activation. Differences in muscle activation existed within the 3 exercises. Clinicians should consider the muscle of interest when prescribing one of these exercises.

© 2011 Lippincott Williams & Wilkins, Inc.

​​You Tube The CJSM Blog Linked In Facebook Twitter



Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.