Technique detection of cross-country ski classical race using kinematic GNSS

Abstract

A world-class cross-country ski player was aimed at a men's time race by the classical style at the 5.3 km course in Finland Vuokatti. At that time, high-precision GNSS was attached to the head and video camera was attached to the lumbar region of the player to detect sub-technique used during the time race. As a result of comparing the type and frequency of the motion method presumed from the vertical motion of the parietal region with that of the video camera image, high coincidence ratio, 99.5 % in double poling, 100.7 % in diagonal stride, 86.0 % in herringbone 86.4 % in 1 kick double poling, 98.2 % in total average was obtained. From the results of our study, it was suggested that high-precision GNSS can be used effectively to detect sub-technique of classical style of cross-country ski race.