女性穿着运动文胸与未着文胸状态下步态特征的差异性

目的 比较女性穿着运动文胸和未着文胸行走时步态特征和步行稳定性的差异，为运动文胸的设计和评价提供依据。方法 使用Qualisys红外光点运动捕捉系统采集12名C罩杯乳房大小女性分别穿着运动文胸及未着文胸状态下在跑步机上行走（6 km/h）的运动学参数。结果 相比未着文胸状态，穿着运动文胸时上躯干角最大值及最小值显著减小，躯干屈曲角和躯干扭转角的幅度较小；10个步态周期的髋关节屈曲角幅度的标准差显著小于裸胸状态，乳房不同支撑状态对步频无显著影响。结论 不同乳房支撑状态显著影响上躯干角度、躯干扭转角与躯干屈曲角。裸胸状态行走时躯干运动幅度增大，行走稳定性下降。不同乳房支撑状态下行走步频存在个体差异。
Objective To compare the differences in gait characteristics and stability of women walking with or without sports bra. Methods Twelve women with C cup breast were required to walk on the treadmill (at the speed of 6 km/h) with and without sports bras, respectively. Their gait parameters were collected by using Qualisys Track Manager high-speed infrared motion capture system. Results Compared with the bare-breasted condition, the maximum and minimum angles of the upper trunk were significantly smaller when subjects wearing the sports bra, the range of trunk flexion angles and trunk torsion angles were also relatively smaller, and the standard deviation of hip flexion angles during 10 gait cycles was obviously smaller. However, no differences were found in stride frequency between two breast support conditions. Conclusions Different breast support conditions have a significant influence on the upper trunk angle, trunk flexion angle and trunk torsion angle. Walking without bra will increase the range of trunk angle and deteriorate the walking stability. The stride frequencies under different breast support conditions have individual differences.