Effectiveness of Action Potential Simulation and Transcutaneous Electrical Nerve Stimulation on Pain and Function of Patients With Chronic Mechanical Shoulder Impairment

Abstract

Purpose: Rehabilitation and physiotherapy have a major role in reducing the pain and increasing\rthe functional ability in patients with shoulder joint pain. This study aimed to evaluate the effect\rof Action Potential Simulation (APS) and Transcutaneous Electrical Nerve Stimulation (TENS)\rin patients with Chronic Mechanical Shoulder Pain (CMSP).\rMethods: In this quasi-experimental study, 32 patients with CMSP were enrolled. Patients\rwere randomly assigned into APS group and TENS group, both of them received 6 sessions\rof intervention. The study instruments included pain intensity and shoulder Range Of Motion\r(ROM), America Surgeons Standardized Shoulder Assessment Form, and Western Ontario\rRotator Cuff Index. The stability of scapula and shoulder function (shoulder dyskinesia) were\rmeasured before and after the intervention. The obtained data were analyzed using t tests by\rSPSS19 (P<0.05).\rResults: Pain intensity, shoulder ROM, and stability of scapula decreased in both groups.\rHowever, there were no significant differences between groups (P>0.05). In addition, shoulder\rfunction did not change after intervention in both groups (P>0.05).\rConclusion: With regard to study findings, APS and TENS are effective in pain reduction but\rnone has preference over the other in treatment approaches.