Effect of Lumbar Posture on Trunk Strength in Young Women

年輕婦女腰部姿勢與活動度對背部肌力之影響

徐阿田(Ar-Tyan Hsu) ； Jenyne Masek ； Ivette Field ； Michael G. Fortanasce

《物理治療》 25卷1期 (2000/01) Pp. 1-14

摘要

目的：本研究之目的是探討在不同的腰部姿勢、腰部活動度與活動度指數(Activity Index)對軀幹肌力之影響。方法：總共有二十個20-30歲間之年輕婦女參與此研究計畫。腰部之活動度以桿狀標誌(stick markers)與影像分析之方法測量；活動度指數則依照Baecke(1982)之問卷方式取得。軀幹之肌力大小則以B-200軀幹肌力測試儀取得。軀幹之肌力之測試是將試者之腰部置於下列二姿勢時進行：1)腰椎中位(Neutral Posture)之位置，2)腰椎前凸(Lordotic Posture)之位置。結果：實驗結果發現軀幹前屈與後仰之最大等長肌力與平均等長肌力以在腰部前凸之姿勢測試位置時其值較大(p=0.041 and p=0.018)。腰部活動度則與軀幹後仰之最大與平均長肌力有線性相關(其相關係數分別為r=0.62 , p=0.003 , r=0.65 , p=0.002)。結論：本實驗之結果支持以腰部前凸之姿勢為軀幹使力較適當之姿勢之假說。

關鍵字

軀幹肌力 ； 腰部姿勢 ； 年輕婦女 ； 腰部活動度

並列摘要

Purpose: to investigate the effect of lumbar spine range of motion (ROM) and pelvic tilt on isometric trunk flexion and extension strength in two different lumbar postures: lordotic and neutral positions. Methods: Twenty female subjects between 20-30 years of age participated in this study. The total lumbar ROM was measured by stick markers and video analysis method. The isometric strength, both trunk flexion and extension in each lumbar posture, was measured with a B-200 Trunk Dynamometer. Results: Extension strength was greater than flexion strength in the lordotic position yielding a ratio of 1.4: 1. Greater isometric flexion and extension strength was produced in the lordotic low back posture as compared to the neutral posture. In lordosis, peak and average strength values were significantly greater than those obtained in the neutral posture (p=0.041 and p=0.018). Total lumbar ROM, however, was significantly correlated with peak as well as average extension strength (r=0.62. p=0.003; r=0.65, p=0.002 respectively). Conclusion: These results suggest that a lordotic low back posture might be a better position for trunk strength generation.

並列關鍵字

Trunk strength ； ROM ； Lumbar posture ； Female