Hips movement of rider during sitting trotVlahović, Marko (Avtor) Potočnik, Klemen (Mentor) Roepstorff, Lars (Komentor) horseequestrian sportsdressage ridingridersmovementThe parameter of rider and horse while riding different dressage elements was studied using inertial measurement sensors attached to both rider`s hips. Six riders were riding ten horses in a straight line (ST), left small circle (LSC) and right small circle (RSC). Video recording was made of all rides using stationary video camera. The start and end of individual dressage element (DE) was determined using video recordings and synchronizing the time data with accelerometer recorded timings. From acceleration and velocity data vertical distance was calculated and then averaged for all usable strides. Range of motion (ROM) was determined as difference between maximal and minimal vertical displacement value. The data were analyzed using SAS/STAT statistical package. The average ROM was 141.5±18.2 mm. The smallest ROM was observed for LSC (139.6±16.5 mm) and the largest for RSC (143.2±19.4 mm). A statistical model indicated that there is a significant influence of DE (p=0.0052) and sensor position (SP) (p=0.0166) on our data variability. A large variability was also observed between rider and horse. The analysis of the variance, for observed ROM, explained 51.9% variability with the horse and 16.5% with the rider and 9.7% with interaction between them, respectively. We have concluded that the horse exerts the greatest influence on vertical range of motion. The riding skills of the rider also contribute to a large extent. The ROM is less affected by DE and SP.20172017-11-15 07:15:40Magistrsko delo/naloga97983VisID: 150056COBISS_ID: 3994504sl