Song Qipeng, Wang Shen, Wong Del P, Zhou Jingyi, Sun Wei, Zhang Cui, Gu Houxin, Mao Dewei
a Shanghai University of Sport, School of Kinesiology , Shanghai , China.
b Shandong institute of Sport Science, Lab of Sports Biomechanics , Jinan , china.
Sports Biomech. 2018 Sep;17(3):402-413. doi: 10.1080/14763141.2017.1358761. Epub 2017 Sep 7.
The effects of long-term Tai Chi exercise on body stability of the elderly during stair ascent under high and low illumination were investigated. Forty-five healthy elderly women were divided into three groups, namely, Tai Chi exercise group, brisk walking group and no-exercise control group. All the participants ascended a staircase, during which force platforms and a motion capture system collected the data. Under the high illumination, Tai Chi exercise participants exhibited higher loading rate and anteroposterior centre of pressure (COP) displacement as well as a lower braking impulse than no-exercise group. Under the low illumination, Tai Chi exercise participants demonstrated higher COP and mediolateral centre of pressure (COP) displacements as well as lower braking and lateral impulses compared with no-exercise participants. The centre of mass (COM) sway in Tai Chi and no exercise participants were higher, the loading rates in Tai Chi and walking participants were higher, and the lateral impulse in no exercise participants was higher under low illumination than under high illumination. Thus, low illumination increases the risk of falling. Tai Chi participants increased their foot clearance, head inclination angle and COP displacement under low illumination to increase their stability during stair ascent.
研究了长期太极拳锻炼对老年人在高低光照条件下上楼梯时身体稳定性的影响。45名健康老年女性被分为三组，即太极拳锻炼组、快走组和无锻炼对照组。所有参与者都上了一段楼梯，在此过程中，测力平台和动作捕捉系统收集了数据。在高光照条件下，太极拳锻炼参与者比无锻炼组表现出更高的负荷率和前后压力中心（COP）位移，以及更低的制动冲量。在低光照条件下，与无锻炼参与者相比，太极拳锻炼参与者表现出更高的COP和左右压力中心（COP）位移，以及更低的制动和横向冲量。在低光照条件下，太极拳参与者和无锻炼参与者的质心（COM）摆动更高，太极拳参与者和步行参与者的负荷率更高，无锻炼参与者的横向冲量比高光照条件下更高。因此，低光照会增加跌倒风险。太极拳参与者在低光照条件下增加了脚离地间隙、头部倾斜角度和COP位移，以提高上楼梯时的稳定性。
