INTRODUCTION: In recent years, The International Paralympic Committee(IPC) has recommended evidence-based classification [1]. Some studies have examined the evidence for classification of several summer sports. However, very few studies have examined the evidence for classification in para-alpine skiing [2]. It is thought that the reason for this is that it is extremely difficult to quantitatively evaluate how much the limitation of physical activity due to impairment affects ski performance and that the measurement itself on the snow is very difficult to conduct. This study aimed to examine the relationship between trunk impairment level and trunk movement during alpine sit-skiing. The knowledge obtained in this study is considered useful for evidence-based classifications. METHODS: Ten sit-skiers (six men and four women), including four Paralympic medalists from the National Paralympic Alpine Ski Team, participated in the present study. They were classified as LW10-2(one skier), LW11(six skiers), LW-12-1(one skier), LW12-2(two skiers), respectively. A motion capture method with inertial measurement units was used to measure the kinematics of the skier (Trunk Extension/Flexion, Trunk Lateral flexion, and Trunk Rotation) during slalom free skiing[3]. RESULTS/DISCUSSION: There was no difference between the classes in the range of motion of the trunk during skiing. The trunk lateral flexion angle was associated with centrifugal force regardless of class. Factors other than the range of motion of the trunk may affect turn performance on snow. In this study, skiers free skied on slalom skis. Then, if you ski at the actual gate, there is a possibility that the result will be different. The population of alpine sit-skiers was quite small and a large number of sit-skiers with the same skill and impairment level could not be evaluated. International collaborative research is needed to increase the number of subjects. CONCLUSION: During the turn, the body is passively moved because of the centrifugal force acting on it. The ROM of the trunk on snow was independent of the degree of disability.
© Copyright 2025 10th International Congress on Science and Skiing, January 28 - February 1, 2025, Val di Fiemme, Italy. All rights reserved.