Purpose: The purpose of this study is to compare a closed chain activity using the Fitter device to open chain activities. Methods: Sixteen subjects participated in the study. Surface electromyographic analysis was used to measure muscle activity for each of the muscles studied including the Upper, Middle and Lower Trapezius Muscles, and Pectoralis Major muscles. Manual Muscle Testing was peformed of all muscles. Open chain and Fitter exercises were performed randomly. Open chain exercises performed were scaption, flexion, abduction, and scapular retraction utilizing Thera-Band. Data Analysis: The data was analyzed for peak root mean square. The t-test was utilized to analyze the data at the .05 level. Results: The Upper, Middle and Lower Trapezius Muscles all produced greater muscle activity with open chain exercises than closed chain exercises. The Pectoralis Major Muscle produced greater muscle activity while performing closed chain exercises utilizing the Fitter. Conclusion: Strengthening the Upper, Middle and Lower Trapezius Muscles is more effective performing open chain exercises versus the Fitter. Strengthening the Pectoralis Major utilizing the Fitter may be an appropriate closed chain exercise.
