背越式跳高“两步”起跳的初步研究

Study on "Two-Strides" Take-off of Back Style High Jump

运用高速摄影方法 ,对我国高水平背越式跳高运动员助跑最后一步摆动腿支撑到起跳腿蹬离地面这一过程中身体重心运动和垂直速度变化规律进行研究 ,论证背越式跳高起跳是从助跑最后一步摆动腿垂直支撑开始到起跳腿蹬离地面结束的“两步”起跳过程 ,指出背越式跳高最大的优越性体现在弧线助跑最后“两步”起跳过程中身体重心运动方向得到改变和垂直速度得到累积。

By high-speed photographing,last stride of approach of fosbury flop on tabe-off of back style high jump were studied.It was improved that the course of take-off include two back-up phases and two swing phases.Free Leg's postback-up phases is just the beginning of take-off.