Purpose : This study was conducted to investigate the effects of thoracic mobilization on shoulder alignment, muscle tone, and pain in adults with rounded shoulder posture.
Methods : This single-blinded, randomized, controlled, comparative study inclu...
Purpose : This study was conducted to investigate the effects of thoracic mobilization on shoulder alignment, muscle tone, and pain in adults with rounded shoulder posture.
Methods : This single-blinded, randomized, controlled, comparative study included thirty adults with rounded shoulder posture. Participants were randomly assigned to either the experimental group (thoracic mobilization, scapular stabilization exercise, and pectoralis stretching, n=15) or the control group (scapular stabilization exercise and pectoralis stretching, n=15). All participants received treatment three times per week for four weeks. Shoulder alignment, muscle tone, and pain were measured before and after the 4-week intervention.
Results : In the experimental group, significant improvements were observed in shoulder alignment, muscle tone, pressure pain threshold, and pain intensity after the intervention (p<.05). The shoulder index increased by 3.17% compared with the pre-intervention value (p<.05). For the upper trapezius, muscle frequency decreased by 2.36 Hz and stiffness decreased by 53.54 N/m (p<.05). In contrast, the lower trapezius showed an increase in muscle frequency of 1.70 Hz and an increase in stiffness of 47.63 N/m (p<.05). The pectoralis major exhibited a decrease in muscle frequency of 2.03 Hz and a decrease in stiffness of 38.68 N/m (p<.05). The pressure pain threshold (PPT) increased by 0.72 kg/cm² (p<.05), and the pain intensity (NRS) decreased by 1.53 points after the intervention (p<.05).
Conclusion : Thoracic mobilization with movement is an effective intervention for improving shoulder alignment and regulating shoulder muscle tone, as well as reducing pain in adults with rounded shoulder posture.