남자 스피드 스케이팅 500 m 후반부 직선 구간 스트로크의 운동역학적 분석

The purpose of this study was to investigate the consistency, work per stroke and power of the gliding and push-off motion for speed skating 400-500 m section. The study included fourteen male 500 m speed skaters (mean height, 1.80 ± 0.03 m; mean weight, 76.1 ± 4.38 kg; record, 35.58 ± 2.73 sec)were divided three groups by record(A<36.00 sec, 36.00 sec ≤ B ≤ 36.50 sec, C>36.50 sec). Data were collected four strokes from middle of 400-500 m section and recorded using six digital SONY FDR-AXP35 video cameras (SONY, Japan) operating at a sampling frequency of 60 fields/sec and shutter speed of 1/500 sec. For each film f rame, the joint positions were digitized using the KWON3D motion analyzer. Position data were filtered with low-pass Butterworth 4th order at the cut-off frequency of 7.4 Hz. The results of the study showed that the stroke time, the gliding distance, the stroke width and the amount of work per stroke was high value and the stroke frequency was low. On the contrary, the stroke time, the stroke distance, the stroke width and the amount of work per stroke is low value, and the stroke frequency is increased. This study's findings indicate that the skaters need to improve their physical strength to perform a consistent and symmetrical stroke. To increase the amount of work per stroke, the stroke distance should be increased while reducing stroke time. Stroke frequency should be increased to increase power. In order to increase the frequency, it is necessary to adjust the stroke width. Stroke frequency and stroke width are important to improving performance.