Comparative Study On The Characteristics Of Different Walking Pace

Human normal slow walk is a foot drives the body moves forward and limbs movement of the anterior and the posterior cruciate,walking in the process of human skeletal muscle to force starting and braking and buffering,bones and joints to lever,and a supporting role,is a human interaction with the ground in the transduction of mechanical process.In order to determine the correct attitude of different groups of people walking,this paper through the way of walking out of sync amplitude of test effect on human tibialis anterior muscle,sural medial head of muscle,lateral head of gastrocnemius muscle,shares lateralis,rectus femoris,shares of medial muscle and semitendinosus muscle and femoral biceps sEMG signal(sEMG)influence,through the test not synchronous amplitude three-dimensional plantar pressure and exercise intensity index of moving load.On this basis,to walk as fitness stride and vigorous walk stride standard formulation provides scientific basis.This thesis consists of three experiments.Experiment a: 10 healthy male volunteers,to 1.25 step / stride frequency seconds,respectively with a height of 15%,22.5%,30%,37.5%,45% and 52.5%,60% and maximum step size to stride,along a straight line in the amortized pavement walk 10 steps,synchronous acquisition tibialis anterior muscle,sural muscle lateral head,medial head of gastrocnemius muscle,shares lateralis,rectus femoris,shares medialis muscle and semitendinosus muscle and femoral biceps surface electromyography(sEMG)signal,analysis of variation characteristics of time-domain indexes iEMG,RMS and frequency domain indexes of MPF,MF.Experiment 2: designated width is 0.5 meters runway by 3-D force measuring system panel,set frequency for 1.25 step / s,set the metronome interval of 0.8 seconds measured subjects in free walking state and with the metronome synchronization,with a height of 15%,22.5%,30%,37.5%,45% and 52.5%,60% and maximum step size for stride,by 3-D force measuring system panel,and to record and calculate the X,y and Z axis of the plantar pressure distribution.Experiment 3: in standard plastic 400 metres from the runway,set cadence was 1.25 step / seconds [6],metronome interval for 0.8 seconds environmental conditions test subjects step,synchronous acquisition by heart rate and average heart rate in the process of recording at the end of the.The experimental results show that in a long time is not synchronized with the pace,the increase of the anterior tibial muscle and the lateral head of the gastrocnemius muscle,medial gastrocnemius,vastus lateralis,rectus femoris,vastus medialis,semitendinosus and femoral head two sEMG iEMG and RMS values were significantly increased;the optimal fitting curve the RMS value of muscle were Logistic curve,the rate of change is the maximum height of 45% stride;the rectus femoris,semitendinosus and femoral head two sEMG MPF value and MF value with the increase of stride length have no significant difference,tibialis anterior,lateral gastrocnemius,medial gastrocnemius muscle first,the vastus lateralis muscle and vastus medialis muscle MPF,MF no significant difference was found in 15%,22.5%,30% and 37.5% step,but in 37.5%,45%,52.5%,60% and the maximum step size with the increase of stride length increased significantly,with increased the value of the step size Linear relation.Experimental results show that the average peak pressure(AVG)in the axial direction of the X 45%,52.5%,15% height step size is statistically significant,with the increase of the step length.The average plantar pressure(AVG)was 37.5%,45%,15%,52.5%,60%,and the maximum height in the axial direction of Y.The length of the foot was statistically significant,with the increase of the step length.The average plantar pressure(AVG)in the axial direction of the Z 45%,52.5%,60% height step size is 15% of the height of the step size is statistically significant,with the increase of the step length.The results show that in the frequency invariant during walking,22.5%,30% height step relative to 15% of the step height of the AhR without significant,37.5%,45% and 52.5%,60% and the maximum height step average heart rate(AHR)relative height step(15%)of the AhR is significant,the average heart rate(AHR)increases with increasing step size,heart rate variation rate maximum at around 45% step height.Above experimental results,we found that 45% at the same frequency,lower extremity muscle gradually increase stride when walking,is gradually to mobilize more muscle fibers in the acting muscle activity;stride in more than 37.5% step height increase step by step,tibialis anterior muscle,sural muscle lateral head,medial head of gastrocnemius muscle,the lateral femoral muscle and vastus medialis gradually mobilization more proportion of fast twitch fibers;stride in more than 37.5% step height increase step by step,exercise load increased;in the process involved in walking fitness should be appropriate stride is selected according to their own situation;should select the height step brisk walking step.