발목 불안정성은 힘의 안정성 및 근육의 질적 변화에 영향을 주는가?

초록

The purpose of this study was to investigate the effects of chronic ankle instability (CAI) on muscle functional performance with force control ability and muscle quality. It was conducted on 12 young adults with CAI. The structural and functional status of muscles and soft tissues was assessed using Myoton and ultrasound. Muscle function tests were evaluated using the Y-Balance, 10m walk, and Hop tests. Submaximal isometric contraction at 15, 30 and 50% of maximal voluntary isometric contraction (MVIC) level were measured to assess force steadiness (FS). In addition, electromyography was used to assess neuromuscular status. All measurements were performed on both the affected and healthy sides of the subjects. The functional performance test results showed significant differences between the affected and healthy sides. The FS showed significant differences at 15 and 30%. The ultrasound measurement results showed statistically significant differences in the soleus and tibialis anterior. The mechanical property analysis results showed significant differences in creep, frequency, and stiffness in the gastrocnemius, and significant differences in creep and relaxation in the medial gastrocnemius. The results of this study confirmed that the functional performance of ankle was deteriorated due to the qualitative decrease of the calf muscles in the affected side and the decrease in muscle properties, along with the lack of force control ability and the weakening of neuromuscular control due to the history of ankle injury. Therefore, when developing a rehabilitation program for ankle instability, a multifaceted functional improvement exercise program for the qualitative improvement of muscles along with training for neuromuscular improvement will be necessary.

키워드