(Abstract)
Modern people''s poor lifestyle or lack of exercise breaks their physical alignment and it causes the increase in nonspecific musculoskeletal pain. Round shoulder posture, the typical one among them, is caused by a number of causes, and is also affected by neck pain or spinal pain. This study applied Hip-Hinge motion, a pelvic activation exercise, to round shoulder subjects and normal people based on the theory of the Anatomy train that our bodies are connected by kinesthetic chains and was executed to explore and compare muscle activity changes of the selected two groups during hip hinge movements. The first group is the Pectoralis major M. and the Deltoid posterior M. which are affected by round shoulders and the other group is the Gluteus medius M. and Semitendinous M. which are involved in stabilizing the lower extremities. It was classified as round shoulder (n=9) and normal (n=9) for healthy young men in their 20s. The standard for selecting round shoulders at this point was to measure the height of the back of the shoulder bone peak from the side of the table and if the height is a <2.5cm or more, it is selected as round shoulders. The movement is to hold a rod fastening it at the back of the head, thoracic vertebrae and coccyx, then push the hips back by retracting the hip joint and get up. It is performed 15 times in a set alternating between the two sides.
The results of this work show that when performing hip hinge movement, the Pectoralis major M. from the round shoulder group differ significantly in the left Pectoralis major M. (p<.05) when the left arm is raised and showed no significant difference in muscle activity of the Deltoid posterior M.. Gluteus medius M. and Semitendinous M. also showed significant difference in muscle activity (p<.05) and overall it was seen high in the round shoulder group. This produced a meaningful result in hip hinge exercises in some parts of round shoulder posture and this study is significant in suggesting different directions for future methods of exercise involving round shoulders.