L.M. Smirnova, S.E. Nikulina

Walking pace is one of parameters used for evaluation of condition of locomotor system of the patient. At the same time it can be a factor influencing other parameters of this locomotion. This article includes the results of influence of walking pace on dynamoplantography parameters of steps in order to increase an accuracy of diagnostics in patients with feet deformations. The analysis of interaction of feet and support at walking was performed using hardware-software complex "Di-aSled-Scan" with matrix measuring elements, being insoles and containing resistive pressure sensors based on composite material with hydrocarbon inclusion. The frequency of data readout was 100 counts per second from every sensor. At examination the measuring elements were put in footwear. Examinations were carried out at walking with three speeds: low, cruiser (habitual and comfort for the patient), fast. Influence of walking pace on 17 parameters describing roll of the feet was analyzed. The determination of re-quired dependences was based on Pearson correlation coefficients and Spearman's correlation coefficients for estimation of correlation ratio between the parameter and velocity factor. The parameters with correlation ratio > 0,3 were accompanied with graphs of distribution of values by walking paces with identification of mean values with errors and trend lines. The highest correlation ratio with pace was identified for three parameters: front push duration factor (with a heel), back push duration factor (with toes), ration of capacity of front and back pushes at the roll. For these parameters we have also made histograms describing the changes of their values with increase of walking pace for every patient. It was identified, that increase in walking pace results in decrease in duration of front push and, on the contrary, in increase in back push duration in relation to the duration of the roll. Higher negative association with walking pace was identified for the ratio of power of front and back pushes of the roll. These changes can be treated as reorganization of roll structure at increase in walking pace as redistribution of its power from the phase of front push formation to the phase of back push formation. Only few patients, in particular, with expressed longitudinal platypodia and pain syndrome have other clinical picture when the ratio of power of front and back pushes in the roll with pace increase has changed only a little, and in some cases has increased, so we can treat it as a failure in compensation abilities in these patients. The received results tell us about inadmissibility of disregard of the walking pace factor at formation of the sche-dule of dynamoplantography examination in patients with feet deformations and at treatment of their results. Walking pace change can be some kind of test for identification of infringements of locomotor function with failure of adaptation to the increased impellent loads.