也称“踏跳腿”。田径运动术语。起跳腿是指做跨、跳动作时，向地面踏蹬的腿。
The take-off system consists of the cushion, 'pedaling and stretching' of the take-off leg and swing of the leg, especially the swing technique.
因此,跳远起跳技术是由起跳腿的“缓冲与蹬伸”和摆动腿的“蹬、摆”等两个技术构成,二者缺一不可。
参考来源 - 我国优秀男子跳远运动员起跳过程中摆动腿技术的运动学研究Our athletes have remarkable difference angle of knee of takeoff-leg with the world people lacking legs strength.
5．我国运动员各相位起跳腿的关节角与世界选手存在显著差异，说明运动员力量的缺乏，尤其是下肢力量的不足。
参考来源 - 我国优秀男子跳远运动员起跳技术的运动学分析·2,447,543篇论文数据，部分数据来源于NoteExpress
摆动腿蹬离地面后积极前摆对加快起跳腿的下压着板、减少水平速度损失、获得较大的腾起初速度有利。
Swinging leg should actively swing forward after taking off the board to lower horizontal speed loss and improve the jumping speed.
少年女子跳远二级运动员起跳离板瞬间，重心速度比高水平运动员慢得多。起跳腿的膝角和髋角也小于高水平选手。
Young female long jump two levels of athletes take off to the board instantaneous, the center of gravity speed scaled height of burst horizontal athlete is much slower.
少年女子跳远运动员在着板瞬间的起跳腿膝角、起跳腿髋角、以及起跳过程中起跳腿的最大屈膝角都小于高水平女子跳远运动员。
The take-off leg knee joint, hip joint Angle when they get to the board and the most keen Angle in the take-off process are all smaller than those of high level female long jumpers.
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