정상 성인에서 체간 굴근, 신근의 근력과 요추 전만각의 상관관계에 관한 연구

A Study on Correlation between Power of Trunk Flexors, Extensors and Lumbar Lordotic Angle in Normal Adults

Objectives : The purpose of this study was to investigate the correlation between lumbar lordotic angle and the power of trunk flexors, extensors in normal adults Methods : 34 normal participants participated in this study. Their lumbar lordotic angle(L1-S1 Cobb’s angle and L1-L5 cobb’s angle) was measured by x-ray taken on lateral direction, erect cross-arm position. And muscle power of trunk flexors and extensors of each participant measured using Cybex HUMAC NORM. Results : 1. The average of L1-S1 Cobb s angle was 47.21±8.88°and the average of L1-L5 Cobb’s angle was 36.32±9.62°(Table Ⅳ). 2. The average ratio of trunk flexors/extensors was 6.44±19.31%(Table Ⅴ). The average power of the trunk flexors was 165.18± 55.05 (Newton-Meter/kg), and the power of trunk extensors was 257.18±85.53 (Newton-Meter/kg)(Table Ⅵ). 3. Lumbar lordotic angle has no relation to the ratio of trunk flexors/extensors(Table Ⅶ, Fig. 4). 4. Lumbar lordotic angle has no relation to both the power of the trunk flexors and extensors(Table Ⅷ, Fig. 5, Fig. 6). Conclusions : These results suggest that the lumbar lordotic angle measured by radiograph could not evaluate the power and ratio of trunk flexors, extensors.