The Influene Of High Heels On Movement Coordination Of Trunk And Lower Limbs In Adult Female During Walking

Objective:To investigate the adaptation of high-heeled women to maintain normal gait, and explore the influence of heel lift on the movement coordination of trunk and lower limbs. Method: 11 healthy subjects were recruited. The markers were attached to the segments of the body. They were asked to walk with their most comfortable high heels and flat shoes at different speeds.The treadmill will be seted in 5 speeds including 1.4km/h,2.2km/h,3.0km/h,3.8km/h,4.6km/h, 10 conditions were set randomly. The kinematic parameters of every segment were collected,calculated by three-dimensional gait analysis system. The difference of intersegmental movement with high heels and flat shoes were compared. Results: Stride frequency,spine Transverse Rotation Amplitude(TRA),thorax-spine TRA,leg TRA and thorax-lumbar Relative Fourier Phase(RFP)were significantly increased with increased speed. Mean stride time,thorax TRA,lumbar TRA,lumbar-leg RFP and frontal amplitude of trunk were significantly decreased with decreased speed. Thorax TRA,thorax-spine TRA,frontal amplitude of trunk were significantly decreased with high heels.Stride length and thorax-leg RFP were not significantly influenced by speed and hight of heels. Conclusions: 1,The subjects'legs get longer with high heels,but stride leng keep invariant,the pendulum movement of hip joint gets smaller, the angular momentum of lower limbs decreases, the amplitude of arm swing decreases,thorax TRA accordingly decreases. 2,In speeding-up walking, thorax-lumbar RFP increases with flat shoes,but it decreases with high-heeled shoes at higher speed,while the heel hight does not significantly influnced lumbar TRA, so the rotation of upper trunk should be restrainted by the sideways muscle of lumbar,the muscle tenses very much,which induces backache for long. 3,Frontal amplitude of trunk decrease along with increasing speed on the two conditions,and it significantly decreases while walking with high heels, which suggests an active controll process to decrease movement amplitude,then gradually tense and strain the muscle of low back,lead to backaches. Consequently,there is significant influnce of high heels on women'movement coordination of trunk and lower limbs, constantly wearing high heels should be considered an important factor of backache.