抄録
A skier turns with a traverse posture in which the outside ski trails the inside one. However, in contrast, a telemarker turns with a telemark posture in which the inside ski trails the outside ski. At the same time, the heel of a telemarker on the inside ski is lifted up from the ski surface. What requires further explanation is how and in what order the telemarker enables heel-freedom, performs edging and modifies the edging of the skis during performance of turns.
We developed a combined model capable of both flexion and extension of the hip joints with an inner rotation of both femurs that can turn like a telemarker. The knee joints and ankle joints were fixed. From a straight down-hill running posture, if the bilateral hip joints around the model's femur axes are rotated inside, it can attain a wedge posture. Then from this wedge posture, by flexion (forward) of the left hip joint and extension (backward) of the right hip joint (or vice versa, i.e., flexion of the right hip joint and extension of the left hip joint), it can achieve a heel-free posture. One servomotor was attached to the flexion and extension of hip joints. This model slightly inclines to the heel-free side and the inside ski runs behind the outside ski. This model can perform a telemark skiing technique, such as wedge turn with heel-freedom by flexion and extension of the hip joints from the wedge posture.
