Abstract:Objective To observe the effect of low-intensity pulsed ultrasound (LIPUS) combined with conventional rehabilitation therapy versus conventional rehabilitation therapy alone on patients with shoulder contracture.Methods A total of 59 patients with shoulder contracture treated in our hospital from January 2024 to December 2024 were selected. Using a random number table, they were divided into control group (n = 30) and experimental group (n = 29). The control group received conventional rehabilitation therapy alone. The experimental group received low-intensity pulsed ultrasound (LIPUS) therapy in addition to conventional rehabilitation therapy. The range of motion (ROM) of the affected shoulder, Visual Analogue Scale (VAS) score, Constant-Murley shoulder score (CMS), and surface integrated electromyography (iEMG) of the deltoid muscle were evaluated before and after treatment.Results The experimental group demonstrated significantly greater improvements in flexion range of motion, abduction range of motion, and extension activity compared to the control group (P < 0.05). Statistically significant differences were observed in the Constant-Murley score (CMS) for the affected shoulder between the two groups before and after treatment (P < 0.05). Additionally, the experimental group exhibited higher improvements in pain intensity, daily living activities, muscle strength, and shoulder joint range of motion compared to the control group. The variations in Visual Analogue Scale (VAS) scores before and after treatment were significantly greater in the experimental group than in the control group (P < 0.05). Furthermore, the differences in anterior flexion integrated electromyography (iEMG) values and abduction iEMG values before and after treatment were also significantly greater in the experimental group compared to the control group (P < 0.05).Conclusion Low-intensity pulsed ultrasound (LIPUS) combined with conventional rehabilitation therapy can significantly relieve shoulder pain, increase the range of motion of the affected shoulder, improve shoulder joint function, increase the iEMG value of the deltoid muscle, and demonstrates superior comprehensive efficacy compared to conventional rehabilitation therapy alone.