Link C S, Nicholson G G, Shaddeau S A, Birch R, Gossman M R
Physical Therapy Department, Institute of Rehabilitation and Research, Houston, TX 77030.
Phys Ther. 1990 Oct;70(10):611-8. doi: 10.1093/ptj/70.10.611.
A purpose of this study was to determine the difference in the lumbar curves of subjects while they stood compared with while they sat in two chairs with different seat angles--the Balans Multi-Chair (BMC) and a standard conventional chair (SCC). An additional purpose was to determine the relationship between lumbar curvature and 1) anthropometric factors and hamstring and hip flexor muscle length during standing and during sitting in the two chairs and 2) amount of time spent sitting. Sixty-one men between 20 and 30 years of age served as subjects. Lumbar curve measurements were taken with a flexible ruler with the subjects first standing and then sitting in the two chairs. Hamstring and hip flexor muscle lengths were indicated by range-of-motion measurements taken with a gravity goniometer. Age, number of hours spent sitting per day, upper body length, and right leg length also were recorded. Subjects had significantly more lumbar extension when they sat in the BMC than when they sat in the SCC. Hip flexor length was the only factor that appeared to relate significantly to the difference between the standing lumbar curve and the lumbar curves in the BMC and the SCC.
本研究的目的之一是确定受试者分别坐在两把具有不同座位角度的椅子（巴兰斯多用途椅（BMC）和标准传统椅（SCC））上与站立时腰椎曲线的差异。另一个目的是确定腰椎曲度与以下因素之间的关系：1）在两把椅子上站立和就坐期间的人体测量因素、绳肌和髋屈肌长度；2）久坐时间。61名年龄在20至30岁之间的男性作为受试者。使用软尺测量腰椎曲线，受试者先站立，然后坐在两把椅子上。通过重力测角仪测量的活动范围来表示绳肌和髋屈肌的长度。还记录了年龄、每天久坐时间、上身长度和右腿长度。与坐在SCC上相比，受试者坐在BMC上时腰椎伸展明显更多。髋屈肌长度似乎是唯一与站立时腰椎曲线和在BMC及SCC上就坐时的腰椎曲线差异显著相关的因素。
