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Effect of motor control retraining program on symptoms, strength, and function in individuals with shoulder
Mohsen Moradi1, Malihe Hadadnezhad1, Amir Letafatkar1
1Sport Injuries and Corrective Exercise, Kharazmi University of Tehran, Tehran, Iran.
Introduction:
The effect of a motor control retraining (MCR) program and feedback on symptoms, strength, and function was investigated in individuals with shoulder impingement syndrome (SIS) and scapular dyskinesis (SD).
Method:
45 men suffering SIS and SD participated in this randomized, controlled single-blind clinical trial. Participants were assigned into control group (CG) (n = 15), motor control retraining (MCR) (n = 15), and motor control retraining with feedback (MCRWF) (n = 15). Pain intensity, pressure pain threshold, function, strength, proprioception, and scapular kinematics was assessed.
Result:
A significant difference was observed between the groups in all the outcome variables except for 45-degree kinematics (p > 0.05). This study showed the effects MCR and MCRWF on the right, left, and central PPT (P < 0.05) in the motor cortex (P < 0.05), function (P < 0.005), proprioception (P < 0.05), and the strength of IR and ER muscles in both concentric and eccentric contractions at 60 and 120°/second (P < 0.05). The results showed that in the 90° kinematics (P < 0.05), 130° (P < 0.05), and the end-range of motion kinematics were significantly different. Finally, a comparison of the motor control group and the motor control with the feedback group showed no statistically significant difference between the pre-test, post-test, and follow-up time points (p > 0.05).
Discussion And Conclusion:
Eight weeks of MCR exercises with and without feedback can improve strength, proprioception, two-dimensional scapular kinematics at 90, 135°, and end-range, function, and pain parameters. The improvement induced by this exercise treatment will linger on even after one month of follow-up assessments.
Trial Registration:
This study was retrospectively registered at Iranian Registry of Clinical Trials on April 14, 2023, and the unique trial number is IRCT20180414039299N1.
