Kinematic Characteristics of Curve Skating in a 300 m Time Trial Race Among Top Roller Speed Skaters

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<p>The purpose of this study was to investigate the kinematic characteristics associated with curve skating among a group of top skaters in a 300 m time trial (TT) race (300 m TT) at the World Roller Speed Skating Championships that were held in China in 2016. The twelve finalists were classified as constituting the top group. A further nine skaters, ranked between 25th and 45th place, were classified as the subgroup. Data from the three-dimensional coordinates were calculated using the direct linear transformation technique. Recorded parameters included the 300 m TT finishing time, stroke frequency, skating speed, distance of center of body mass (COM) from support leg (Dcom), and the segment and shank tilt angle of the support leg. The results confirmed that the Top roller skaters glided at a higher skating speed on the right stroke and operated at a higher stroke frequency for both strokes. The Dcom was similar in both groups for both strokes. The top roller skaters demonstrated less forward thigh rotation and more forward shank rotation. These results suggested that the top roller skaters:</p><p>1) glided at a higher skating speed on the right stroke by obtaining a higher stroke frequency to move their COM inward.</p><p>2) moved their COM forward by increasing their shank forward rotation.</p><p>3) generated a higher stroke frequency by rotating their shank forward for both left and right strokes.</p>

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