고관절 내전 및 외전 운동에서 청년층과 고령층의 근활성도 비교 분석 (A Comparative Analysis on the Muscle Activity of the Young and the Elderly in Hip Adduction and Abduction Movement)

서지정보

· 발행기관 : 대한인간공학회
· 수록지 정보 : 대한인간공학회지 / 37권 / 6호 / 771 ~ 780페이지
· 저자명 : 나주영, 정광태, 홍재수

초록

Objective: The purpose of this study is to compare the muscle activity of the young and the elderly in hip adduction and abduction movement.
Background: While muscle strength is an essential factor for stable and efficient walking, older people aged 65 or older have significantly reduced muscle strength characteristics compared to the young. The adductor and abductor muscles of hip are closely related to the physical balance of walking. Although the main user of hip rehabilitation equipment is an elderly person, young people are often forced to rehabilitate hip joints due to physical accident. In this regard, the need for a comparative analysis of how the muscle activity of the young and the elderly differs is raised in the hip rehabilitation movement.
Method: EMG signals were measured while exercising hip adduction and abduction movement under five backrest angle; 90°, 100°, 110°, 120°, and 130°. Fourteen young subjects and twelve senior subjects participated in the experiment. EMG data were normalized using a 10~350Hz FIR bandpass filter to eliminate noise. The significance of %MVC difference between young and senior group was analyzed using t-test.
Results: The muscle activity of the adductor longus with the backrest angle in hip adduction movement is not significantly different between the elderly and the young.
However, both groups tended to have a higher value for muscular activity as the back angle increased. The muscle activity of the tensor fascia latae with the backrest angle in hip abduction movement is significantly different between the elderly and the young. It is also significantly different for gluteus medius. Both groups tended to have a higher value for muscular activity of the tensor fascia latae as the backrest angle increased. On the other side, both groups tended to have a lower value for muscular activity of the gluteus medius as the backrest angle increased.
Conclusion: This study identified the significance of difference between the elderly and the young's muscle activity of hip adduction and abduction movement with the backrest angle of chair in hip rehabilitation equipment. The difference between the elderly's and the young's muscle activity is not significant in adduction movement, but significant in abduction movement.
Application: This study could serve as a basis for designing the chair backrest of hip rehabilitation equipment.

영어초록

Objective: The purpose of this study is to compare the muscle activity of the young and the elderly in hip adduction and abduction movement.
Background: While muscle strength is an essential factor for stable and efficient walking, older people aged 65 or older have significantly reduced muscle strength characteristics compared to the young. The adductor and abductor muscles of hip are closely related to the physical balance of walking. Although the main user of hip rehabilitation equipment is an elderly person, young people are often forced to rehabilitate hip joints due to physical accident. In this regard, the need for a comparative analysis of how the muscle activity of the young and the elderly differs is raised in the hip rehabilitation movement.
Method: EMG signals were measured while exercising hip adduction and abduction movement under five backrest angle; 90°, 100°, 110°, 120°, and 130°. Fourteen young subjects and twelve senior subjects participated in the experiment. EMG data were normalized using a 10~350Hz FIR bandpass filter to eliminate noise. The significance of %MVC difference between young and senior group was analyzed using t-test.
Results: The muscle activity of the adductor longus with the backrest angle in hip adduction movement is not significantly different between the elderly and the young.
However, both groups tended to have a higher value for muscular activity as the back angle increased. The muscle activity of the tensor fascia latae with the backrest angle in hip abduction movement is significantly different between the elderly and the young. It is also significantly different for gluteus medius. Both groups tended to have a higher value for muscular activity of the tensor fascia latae as the backrest angle increased. On the other side, both groups tended to have a lower value for muscular activity of the gluteus medius as the backrest angle increased.
Conclusion: This study identified the significance of difference between the elderly and the young's muscle activity of hip adduction and abduction movement with the backrest angle of chair in hip rehabilitation equipment. The difference between the elderly's and the young's muscle activity is not significant in adduction movement, but significant in abduction movement.
Application: This study could serve as a basis for designing the chair backrest of hip rehabilitation equipment.

참고자료

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