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주행조건에 따른 무동력 트레드밀의 곡률반경별 주행안정성 비교 : Self-Paced Speed vs Fixed Speed
노종련(Jongryun Roh),형준호(Joonho Hyeong),황창현(Changhyun Hwang),김사엽(Sayup Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
An understanding of dynamic stability during running is of paramount importance for the prevention of falling and injury. Numerous studies on dynamic stability have focused on the characteristics of dynamic stability under self-paced speed (SS) and fixed-speed (FS) conditions. However, few studies have focused on the direct comparison of these two conditions. The recently introduced non-motorized curved treadmill (NMCT) has been proposed for use in experiments under both SS and FS conditions because it permits repetitive changes in running conditions through low friction and a curved running belt, as well as real-time control of steps using a metronome. In this study, the margin of stability (MOS), which is an index of dynamic stability, was evaluated for 16 healthy male adults under SS and FS conditions using an NMCT. The results of a two-way repeated-measures analysis of variance revealed an interaction between the radius of curvature and speeds (P<0.001). In addition, the results of a paired t-test confirmed a significant difference between the SS and FS conditions (P<0.05). The results of the experiment showed that under both SS and FS conditions, the dynamic stability increases as the radius of curvature increases during slow walking and fast walking (P < 0.05). However, under SS conditions, as the radius of curvature increases during running, the anterior–posterior margin of stability (MOSap) decreases (P<0.05), whereas no distinctive trend was detected under FS conditions (P>0.05). The results of this study can be used to enhance the capacity for exercise and the effects of rehabilitation exercise.