从对蹬冰加速理论的质疑点看克莱普冰刀的设计构想

Discussion about the Designing Conception of Klap Runner from the Query Viewpoint of Pushing Accelerating Theory

从对蹬冰加速理论的质疑点角度,探讨了克莱普冰刀的设计构想。结果表明,克莱普冰刀的设计思想不仅仅是延长了蹬冰时间、提高了踝关节的灵活性、加大了蹬冰腿膝关节的伸展范围、保持了髋关节的平稳移动,更重要的意义在于揭示重心沿滑行方向上的前移作用。它改变了以往人们对加速理论中,只有在与滑行方向水平面内相垂直的蹬冰力才对加速起贡献作用的传统认识,暗示出在滑行方向上切向和法向速度均对重心的加速起作用的观点。

The authors discusses the designing conception of Klap runner due to the doubt of pushing accelerating theory.The authors think that Klap runner's designing conception prolongs the pushing time,increases the pliability of ankle joint,enlarges the stretching scope of the pushing leg and knee joint and keeps hip's moving stably.In addition,it revealed the gravity center's effect of moving forward in the sliding direction.It has changed traditional idea that only the pushing force which is vertical to the level in sliding direction can make contributions to accelerating in the previous theory of accelerating and suggests that both tangential velocity and normal velocity in the sliding direction have effect on the accel-erating of gravity center.