Table 1.

Participant Demographics and the Percentage Change in Peak Vertical Ground Reaction Force (vGRF) in Each Condition^a

	No. (%)
Characteristic	Entire Cohort (n = 30)	Subgroup (n = 22)
Sex, No. (%) females	21 (70)	16 (73)
Graft type, No. (%) patellar tendon autograft	14 (47)	11 (50)
Concomitant meniscal surgery	17 (56.7)	12 (55)
	Mean ± SD
Age, y	20.43 ± 2.91	20.32 ± 3.0
Height, cm	172.70 ± 10.81	171.77 ± 10.27
Mass, kg	73.16 ± 16.10	73.24 ± 15.27
Body mass index	24.42 ± 4.25	24.73 ± 4.33
Months since ACLR (range)	47.83 ± 26.97 (6–118)	47.27 ± 29.32 (6–118)
International Knee Documentation Committee score	86.49 ± 9.51	87.53 ± 7.75
Tegner Scale score	7.47 ± 1.33	7.64 ± 1.40
Baseline vGRF outcomes
ACLR-limb vGRF, % BW	1.11 ± 0.06	1.09 ± 0.04
Contralateral-limb vGRF, % BW	1.12 ± 0.06	1.10 ± 0.04
vGRF Limb symmetry index, %	98.72 ± 2.62	98.66 ± 2.86
Loading-condition change in ACLR-limb peak vGRF, %
Control	1.35 ± 2.37	1.41 ± 1.99
Symmetric	1.31 ± 3.77	0.55 ± 2.57
High	5.04 ± 2.33	4.56 ± 2.31
Low	−2.31 ± 2.28	−2.33 ± 2.43
Loading-condition change in contralateral-limb peak vGRF, %
Control	1.56 ± 2.49	1.79 ± 2.60
Symmetric	1.23 ± 4.42	0.19 ± 2.44
High	5.20 ± 3.18	5.06 ± 3.50
Low	−1.81 ± 3.43	−1.79 ± 3.95
Loading-condition average strides/min
Control	54.93 ± 3.29	54.86 ± 3.28
Symmetric	55.93 ± 4.18	55.95 ± 3.99
High	55.67 ± 4.20	55.59 ± 3.58
Low	55.67 ± 5.08	54.54 ± 5.23

Abbreviations: % BW, percentage of body weight; ACLR, anterior cruciate ligament reconstruction.

^aThe percentage change in peak vGRF was calculated as the percentage change score from baseline (peak vGRF during the final minute of the loading condition/baseline peak vGRF] * 100).