EFFECTS OF CLOSED CHAIN STABILIZATION EXERCISE APPLIED TO THE SCAPULAR ON MUSCLE ACTIVITY AND NECK DYSFUNCTION IN ADULTS WITH LOSS OF CERVICAL LORDOSIS

Abstract

This study was conducted to investigate the effect of scapular stabilization exercise of the closed chain method and the open
chain method on adults with a loss of cervical lordosis. The subjects of this study were 20 adults with a craniovertebral angle
(CVA) of 55 degrees or more. This experiment was conducted during the month of May 2022. The subjects were randomly
divided into 10 people in the open chain scapular stabilization exercise group and 10 people in the closed chain scapular
stabilization exercise group, and exercise was performed twice a week for 4 weeks. Surface EMG was used to evaluate the
muscle activity of the upper trapezius muscles before and after intervention, and the Neck disability index (NDI) was
performed to determine the degree of neck disability. In the muscle activity of the upper trapezius muscle during neck extension
in the sitting position, both the open chain group and the closed chain group showed a significant decrease in muscle activity
with time before and after intervention(p<0.05), but between time and group there was no significant difference between
interaction and group (p>0.05). In the muscle activity of the upper trapezius muscle during the 120° arm flexion and abduction
motion in the standing position, both the open chain group and the closed chain group showed a significant decrease in muscle
tone with time before and after intervention (p<0.05), and time There was an interaction between the group and the group
(p<0.05), and in the post-mortem test, the muscle activity of the trapezius muscle during arm bending was significantly
decreased in the closed chain group than in the open chain group (p<0.025). There was no significant difference between
groups (p>0.05). In the results of comparison of the average values of neck disability scores in the pre-intervention and postintervention tests of the open chain group and the closed chain group, the open chain group showed a statistically significant
decrease in scores to 9.6±3.84 points before exercise and 5.3±3.92 points after exercise. (p<0.05), and even in the closed chain
group, there was a statistically significant decrease in scores of 11.4±4.48 before exercise and 6±3.56 after exercise (p<0.05).
However, no significant difference was found between groups. did not (p>0.05). This study confirms the effect of each type
of exercise of the scapular stabilization exercise, which has been widely used for shoulder-related problems, so that it can be
used as a new treatment method for neck-related problems.