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

Sports Medicine - Open

Table 3 Group comparisons of landing kinetics (Mann–Whitney-U test)

Variable	Group	Median	IQR	Test statistic (U)	p-value	Effect size (δ)
Max COP	CON	378.00	325.00–394.00	78.00	0.16	0.30
Max COP	ACLR	393.00	338.00–433.00	78.00	0.16	0.30
Min COP	CON	331.00	294.00–354.00	87.00	0.30	0.22
Min COP	ACLR	339.00	321.00–380.00	87.00	0.30	0.22
Mean COP	CON	344.00	309.00–361.00	64.00	0.04*	0.43
Mean COP	ACLR	379.00	325.00–397.00	64.00	0.04*	0.43
Max TTS	CON	1.79	1.37–2.11	90.00	0.36	0.20
Max TTS	ACLR	1.96	1.61–2.27	90.00	0.36	0.20
Min TTS	CON	1.54	1.24–1.78	105.00	0.77	0.06
Min TTS	ACLR	1.44	1.18–1.91	105.00	0.77	0.06
Mean TTS	CON	1.54	1.39–1.66	106.50	0.82	0.05
Mean TTS	ACLR	1.59	1.28–1.87	106.50	0.82	0.05
Max vGRF	CON	3.59	3.37–4.15	81.00	0.20	0.28
Max vGRF	ACLR	4.04	3.84–4.57	81.00	0.20	0.28
Min vGRF	CON	2.87	2.46–2.94	55.50	0.01*	0.50
Min vGRF	ACLR	3.21	2.79–3.47	55.50	0.01*	0.50
Mean vGRF	CON	3.05	2.90–3.59	54.00	0.01*	0.52
Mean vGRF	ACLR	3.67	3.51–3.99	54.00	0.01*	0.52

All kinetic data (except for TTS) were calculated during initial contact. ACLR = Anterior cruciate ligament reconstruction, CON = contrl, COP = center of pressure, TTS = time to stability, GRF = ground reaction force, v = vertical, max = maximum, min = minimum. δ = Cliff’s delta, * significant difference