Table 2.

Biomechanical variables for controls and patients at both legs during landing from a drop vertical jump

Variables	Controls (n = 28)		ACLR patients (n = 17)		p-values
	Involved	Non-involved	Involved	Non-involved	Leg effect	Group effect	Leg*group
Peak knee power absorptiona (W kg−1)	15.07 (±3.11)	16.31 (±2.70)	14.11 (±4.15)	17.31 (±3.38)	0.003	n.s	n.s
Energy absorbedb (J kg−1)	1.49 (±0.32)	1.58 (±0.27)	1.22 (±0.39)	1.62 (±0.40)	<0.001	n.s	0.010§,†
Knee flexion angle at initial contact (°)	26.5 (±9.5)	27.2 (±9.0)	23.4 (±8.0)	24.0 (±7.0)	n.s	n.s	n.s
Knee valgus angle at initial contact (°)	3.3 (6.3)	4.5 (4.7)	3.7 (4.9)	2.0 (3.4)	n.s	n.s	0.023
Peak knee flexion angle (°)	101.0 (±11.4)	101.7 (±11.8)	93.8 (±14.9)	96.9 (±14.7)	0.019	n.s	n.s
Peak knee valgus angle (°)	4.6 (±6.6)	6.1 (±5.0)	6.2 (±4.6)	5.3 (±4.9)	n.s	n.s	n.s
Peak knee flexion moment (Nm kg−1)	1.91 (±0.30)	2.03 (±0.26)	1.74 (±0.35)	2.10 (±0.44)	0.001	n.s	n.s
Peak knee valgus moment (Nm kg−1)	0.06 (±0.08)	0.07 (±0.08)	0.14 (±0.13)	0.17 (±0.10)	n.s	0.001	n.s
Peak knee varus moment (Nm kg−1)	0.36 (±0.27)	0.35 (±0.17)	0.17 (±0.10)	0.19 (±0.17)	n.s	0.001	n.s
Peak vertical GRF (×BW)	1.67 (±0.41)	1.74 (±0.46)	1.83 (±0.57)	1.87 (±0.47)	n.s	n.s	n.s
ATD200 (mm)	4.3 (±0.8)	4.3 (±0.6)	5.6 (±1.1)	4.4 (±0.8)	<0.001	0.002	0.002§,†,‡
IR5 (°)	19.24 (±5.10)	19.22 (±4.50)	20.35 (±4.80)	19.48 (±4.29)	n.s	n.s	n.s

Jumps are defined from touch down to maximal knee flexion

GRF ground reaction force, BW body weight, ATD200 = maximal anterior tibial displacement at 200 Newton, IR5 maximal rotational knee laxity at 5 Nm

^§ Significant difference between ACLR_inv and ACLR_n-inv

^† Significant difference between ACLR_inv and CON_inv

^‡ Significant difference between ACLR_n-inv/CON_n-inv

^a Peak knee power absorption in the sagittal plane

^b Energy absorbed in the sagittal plane