Table 1 Comparison mean (±SD) of jumping height, and lower extremity kinematics between hop-jump and step-close-jump tasks.

	Hop-jump	Step-close-jump
Jumping height (m)	.32 (.04)	.32 (.04)
Hip angle at initial foot contact with ground (deg)	108.9 (3.9)	117.9 (6.2) ***
Knee angle at initial foot contact with ground (deg)	144.9 (6.7)	156.8 (3.7) ***
Hip angular displacement during landing (deg)	7.5 (6.7)	20.7 (5.8) ***
Knee angular displacement during landing (deg)	50.1 (8.2)	64.5 (8.5) ***
Hip angular velocity at initial foot contact with ground (deg/sec)	-2.08 (1.52)	-4.53 (2.61) **
Knee angular velocity at initial foot contact with ground (deg/sec)	-5.77 (. 94)	-5.07 (1.47)

***denote p < 0.001 respectively** denote p < 0.01 respectively