Table 2.

Summary of factor analysis for the Lower-Extremity Assessment Protocol.

	Components	Factor Loading
		Factor 1	Factor 2	Factor 3	Factor 4
Functional task	Single hop	0.926	0.296	−0.131	0.007
	Triple hop	0.900	0.374	−0.184	0.031
	Cross-over hop	0.877	0.389	−0.188	0.035
	6 m timed hop	−0.784	−0.198	0.422	0.267
Muscle strength	Isokinetic knee flexion 180°/s	0.144	0.917	−0.265	−0.018
	Isokinetic knee extension 180°/s	0.310	0.868	0.130	0.087
	Isokinetic knee flexion 90°/s	0.407	0.849	−0.070	−0.212
	Isokinetic knee extension 90°/s	0.389	0.778	−0.155	0.262
	Isometric knee extension	0.547	0.551	0.118	0.485
	Isometric knee flexion	0.497	0.504	−0.177	0.254
Neuromuscular control	Static single-leg balance	−0.208	−0.122	0.892	−0.106
	Landing error scoring system	−0.319	−0.127	0.772	0.107
Fatigue index	Knee flexion fatigue index	−0.147	−0.047	−0.079	0.854
	Knee extension fatigue index	0.217	0.245	0.509	0.614
Eigenvalue		4.247	3.989	2.084	1.625
Variance (%)		30.335	28.492	14.884	11.604
Cumulative variance (%)		30.335	58.827	73.710	85.315
KMO = 0.318, Bartlett’s x = 253.318 (p < 0.001).