earticle

영어

Purpose: This study aimed to investigate the effects of half-lunges with visual feedback and axial shortening on the psoas muscle thickness. Methods: This study included 20 healthy adults (20 men; mean age, 22.1 years) and used a repeated-measures design. All participants performed two types of motion (axial shortening and half-lunge with visual feedback) during respiratory muscle training. The psoas muscle thickness (at rest and during contraction) during the two motions was measured using ultrasonography. Results: Significant pre- and post-test changes in the psoas muscle thickness were observed in both groups (p<.05). However, a significant difference between the two motions was observed only in the normal group (p<.05) and not in the lengthened group (p<.05). Conclusion: The results of this study are significant as they confirm the effectiveness of half-lunges with visual feedback in selectively increasing the contraction of the psoas major muscle, regardless of the length of the iliopsoas muscle. This finding underscores the potential of half-lunges with visual feedback as an effective intervention for improving movement control dysfunction in the extension direction of the hip joint by limiting the uncontrolled movement of the adjacent joint.