The Effect of Eight Weeks of Core Stability Training on Stable and Unstable Surfaces on Range of Motion, Proprioception, and Muscle Strength in Individuals with Rotator Cuff Tendinopathy; Randomized Controlled Trial

Document Type : Original Articles

Authors
Alireza Abbasi 1
Seyed Sadredin Shojaedin 2
1 MSc, Department of Biomechanics and Sports Injury, School of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
2 Professor, Department of Biomechanics and Sports Injury, School of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
10.48305/jrrs.2026.46070.1131
Abstract
Introduction: Rotator cuff tendinopathy is one of the most common musculoskeletal injuries. The aim of this study was to investigate the effects of eight weeks of core stability training on stable and unstable surfaces on range of motion, proprioception, and muscle strength in individuals with rotator cuff tendinopathy.
Materials and Methods: The study sample consisted of 36 participants from Kharazmi University, Karaj branch, who met the inclusion criteria. They were randomly assigned to three groups of 12: stable training, unstable training, and control. Range of motion, muscle strength, and proprioception were measured using a goniometer and an isokinetic device. Participants in the training groups performed core stability exercises on stable and unstable surfaces for eight weeks. After the training period, post-test measurements were recorded. Data were analyzed using SPSS with ANCOVA followed by Bonferroni post hoc tests at a significance level of 0.05.
Results: Eight weeks of training led to statistically significant improvements in shoulder rotator muscle strength and proprioception in both internal and external rotation (P < 0.05); however, range of motion showed no significant changes (P > 0.05). The unstable training group demonstrated greater improvements in proprioception and muscle strength compared to the stable training group.
Conclusion: Core stability training on both stable and unstable surfaces can be considered an effective intervention in rehabilitation programs to enhance shoulder function in individuals with rotator cuff tendinopathy.
Keywords
Range of Motion
Muscle Strength
Proprioception
Rotator cuff tendinopathy
Subjects
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