Knee Biomechanics During Neurocognitively Challenged Drop Landings in Male Elite Soccer Players with Anterior Cruciate Ligament Reconstruction

Sports Medicine - Open

Table 6 Correlations between neurocognitive function and landing kinematics

Variables			Correlation coefficients			Δ of group correlations: p (z-value)
Variables			Full dataset	CON group	ACLR group	Δ of group correlations: p (z-value)
Verbal memory	FLX	Max	0.01	0.15	0.07	0.42 (0.19)
		Min	0.09	0.26	0.03	0.28 (0.57)
		Mean	0.03	0.18	0.00	0.32 (0.44)
	VLG	Max	− 0.33	− 0.22	− 0.42	0.19 (0.86)
		Min	− 0.00	− 0.05	− 0.37	0.20 (0.82)
		Mean	− 0.20	− 0.00	− 0.57*	0.05 (1.58)*
	TIBIA ROT	Max	0.02	− 0.13	− 0.12	0.49 (0.02)
		Min	− 0.15	− 0.28	0.16	0.13 (1.10)
		Mean	0.18	− 0.12	0.09	0.30 (0.52)
Visual memory	FLX	Max	0.33	0.04	0.51*	0.10 (1.28)
		Min	0.10	0.28	0.25	0.46 (0.07)
		Mean	0.35	0.13	0.53*	0.04 (1.12)*
	VLG	Max	0.00	− 0.20	− 0.28	0.41 (0.20)
		Min	0.00	− 0.18	− 0.06	0.38 (0.29)
		Mean	− 0.01	− 0.05	− 0.17	0.38 (0.29)
	TIBIAL ROT	Max	− 0.55*	− 0.49*	− 0.58*	0.37 (0.31)
		Min	− 0.35*	− 0.27	− 0.40	0.36 (0.36)
		Mean	− 0.08	− 0.33	0.10	0.13 (1.09)
Processing speed	FLX	Max	0.09	0.14	0.25	0.39 (0.28)
		Min	0.64*	0.41	0.63*	0.22 (0.74)
		Mean	0.19	0.26	0.31	0.44 (0.13)
	VLG	Max	− 0.22	− 0.25	− 0.15	0.39 (0.25)
		Min	− 0.23	− 0.19	− 0.12	0.43 (0.17)
		Mean	− 0.07	− 0.01	− 0.09	0.42 (0.19)
	TIBIAL ROT	Max	− 0.01	− 0.01	− 0.11	0.40 (0.24)
		Min	− 0.02	− 0.38	− 0.12	0.24 (0.68)
		Mean	− 0.27	− 0.37	− 0.33	0.45 (0.11)
Reaction time	FLX	Max	0.31	0.50*	0.30	0.27 (0.58)
		Min	0.62*	0.44*	0.46*	0.47 (0.06)
		Mean	0.32	0.52*	0.25	0.21 (0.78)
	VLG	Max	− 0.13	− 0.15	− 0.23	0.41 (0.20)
		Min	− 0.35	− 0.34	− 0.26	0.18 (0.89)
		Mean	− 0.29	− 0.31	− 0.26	0.44 (0.13)
	TIBIAL ROT	Max	− 0.20	− 0.36	− 0.09	0.24 (0.70)
		Min	− 0.40	− 0.47	− 0.42	0.43 (0.15)
		Mean	− 0.12	− 0.03	− 0.29	0.25 (0.65)

Table shows Spearman’s Rho correlation coefficients. Significant associations are marked bold and with an asterisk. All kinematic data are expressed as [°]. ACLR = anterior cruciate ligament reconstruction, CON = control, FLX = Flexion, VLG = Valgus, ROT = Rotation, max = maximum, min = minimum