For our jumper, the angle speed increase unceasingly during takeoff phase, but the angle speed tends to zero during extension.Its character is conform to principle of biomechanics.

• 我国男子跳远运动员在起跳过程中摆动腿摆动速度在蹬离地面至最大缓冲阶段角速度不断增加，蹬伸阶段角速度为零，其特征与运动生物力学有关原理相符；