Ishige Yusuke, Inaba Yuki, Hakamada Noriko, Kobayashi Akio, Yoshioka Shinsuke
Department of Sport Science Japan Institute of Sports Sciences, Japan High Performance Sport Center Kita-ku Tokyo Japan.
Department of Orthopaedic Surgery Shiraniwa Hospital Ikoma Nara Japan.
Health Sci Rep. 2025 Jun 11;8(6):e70858. doi: 10.1002/hsr2.70858. eCollection 2025 Jun.
In the present study, we examined the effect of trunk range of motion (ROM) on turn performance in Para Alpine Skiing by comparing the ROM of the trunk on land with that of the trunk on snow in different classes. We attempted to clarify the relationship between impairment tests and athletic performance by examining the relationship between centripetal acceleration during skiing and trunk ROM, which is difficult to reproduce during athletic activities on land.
Six male and four female skiers from sitting classes participated in this study. MRI images of the trunk and thigh were obtained. The ROM of the trunk was measured using the motion capture method during the Board Test on land and freeskiing on snow.
The ROM of the trunk in the Board Test increased with a lower degree of disability. However, there was no relationship between the ROM of the trunk on snow and the degree of disability. A number of lateral flexion angles during turns exceeded the ROM of the trunk on land. The magnitude of centrifugal force did not depend on the degree of impairment. The relationship between the centrifugal force and the lateral flexion angle was linear.
The Board Test is an appropriate impairment test. During the turn, the body is passively moved because of the centrifugal force acting on it, a value that significantly exceeds the ROM of the trunk on land. The ROM of the trunk on snow was independent of the degree of disability.
在本研究中，我们通过比较不同级别运动员在陆地上和雪地上的躯干活动范围（ROM），研究了躯干活动范围对残奥高山滑雪转弯表现的影响。我们试图通过研究滑雪时的向心加速度与躯干活动范围之间的关系，来阐明损伤测试与运动表现之间的关系，而这一关系在陆地体育活动中难以重现。
六名男子和四名女子坐姿级别的滑雪运动员参与了本研究。获取了躯干和大腿的MRI图像。在陆地上的平板测试和雪上自由滑雪过程中，使用动作捕捉方法测量躯干的活动范围。
在平板测试中，躯干的活动范围随着残疾程度的降低而增加。然而，雪上躯干的活动范围与残疾程度之间没有关系。转弯过程中的一些侧屈角度超过了陆地上躯干的活动范围。离心力的大小不取决于损伤程度。离心力与侧屈角度之间的关系是线性的。
平板测试是一种合适的损伤测试。在转弯过程中，由于作用在身体上的离心力，身体会被动移动，该离心力的值显著超过陆地上躯干的活动范围。雪上躯干的活动范围与残疾程度无关。
