MyoVision 시스템을 활용한 허리 근육 건강 상태에 따른 피로도에 대한 생체지표 변화 연구

Abstract

Objective: The aim of this study was to identify changes in bio-parameters before and after muscle fatigue according to the health status of the lumbar muscles. Background: Low back pain is frequently occurring pain area in various industrial field. There are a lot of researches that compare bio-parameters on healthy people and low back pain patients or analyze the change on bio-parameter by fatigue effect. However, researches that compare bio-parameters on lumbar muscle health and fatigue are insufficient. Method: The experiment was conducted on 15 male adults. All participants performed Sorensen test that was consist of 30 seconds of task / 30 seconds of rest for 20 minutes. Myovision was used to classify muscle and people health condition into three types (chronic, normal, acute) according to muscle activity and a variety of bio-parameters were used to compare fatigue pre/post. Results: As a result, the Flexion Relaxation Ratio (FRR) decreased in the normal muscle group and increased in the acute muscle group after muscle fatigue. Although generally the %frequency decreased in all of group, the decrease in normal muscle groups was lower than in chronic/acute muscle groups. Overall, subjective discomfort increased in all muscle groups, but the increase discomfort in normal muscle groups was lower than that of acute muscle groups. Conclusion: In general, healthy muscle groups showed a decrease in FRR after muscle fatigue, while non-healthy muscle groups showed an increasing trend. Therefore, when assessing muscle fatigue from performing a task using FRR, it might be said that post-classification of muscle health conditions should be performed and then interpreted. In addition, non-healthy muscle group was found to be more vulnerable to fatigue by using fatigue parameters and subjective discomfort. Therefore, nonhealthy muscle groups were likely to require continuous monitoring in industrial field. Application: Changes in FRR after fatigue would be evaluated differently between healthy and non-healthy muscle groups.