Comparing the effectiveness of endurance protocols on the posterior rotator cuff muscles: Endurance repetition weight training vs. static isometric hold training
AdvisorManske, Robert C.
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Ash, M.; Coble, C.; Gartner, E.; Sauber, A.; Walls, M. 2022. Comparing the effectiveness of endurance protocols on the posterior rotator cuff muscles: Endurance repetition weight training vs. static isometric hold training -- In Proceedings: 18th Annual Symposium on Graduate Research and Scholarly Projects. Wichita, KS: Wichita State University
INTRODUCTION: Posterior shoulder musculature play a crucial role in rehabilitation of shoulder pathology. PURPOSE: To determine which type of posterior shoulder muscular endurance protocol, endurance repetitions or endurance with static isometric holds, improves muscular endurance more. Poor posterior shoulder endurance can be a precursor to shoulder injury. METHODS: Healthy participants were divided into three groups; control, repetition training, and an isometric training group. The training groups performed shoulder strengthening exercises 2-3x/week for 10 weeks. Both groups were advised to exercise at level of 4-6 on the Omni- Resistance Scale. Control group didn't exercise. Strength and endurance testing was at baseline, 5, and 10 weeks. Strength was measured via manual muscle testing (MMT) with a handheld digital dynamometer (HDD). Endurance testing included a side-lying external rotation repetitions test and side-lying external rotation (ER) isometric hold. The dominant (DOM) shoulder was used for all strengthening. RESULTS: No difference was found between DOM and non-dominant (ND) shoulder flexion (F(10,350)=1.72, p=0.075), abduction (F(10,350)=1.56, p = 0.117), or ER (F(10,350) = 1.22, p= 0.277) strength between the three training groups over time. No difference was found between DOM and ND shoulder ER isometric endurance test between groups over time (F(10,350) = 1.04, p=0.407). A difference was found between DOM and ND ER endurance repetition test between groups over time (F(10,350)= 2.69, p=0.004). CONCLUSION: While each group saw improvements in shoulder strength, neither training groups produced a significant increase in strength compared to the control. However, shoulder ER repetition endurance was improved in both training groups.
Presented to the 18th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Rhatigan Student Center, Wichita State University, April 29, 2022
Research completed in the Department of Physical Therapy, College of Health Professions