The Effects of High-Intensity versus Low-Intensity Resistance Training on Leg Extensor Power and Recovery of Knee Function after ACL-Reconstruction

Table 3

Change in muscle power and knee joint laxity during the intervention period.

	7 weeks after surgery		14 weeks after surgery		20 weeks after surgery
	HRT	LRT	HRT	LRT	HRT	LRT
Leg extensor power	64.0 ± 3.4; (57.1; 70.8)	64.8 ± 3.2; (58.3; 71.3)	84.1 ± 3.4*; (77.3; 91.0)	73.3 ± 3.3; (66.6; 79.9)	97.5 ± 3.6**; (90.3; 104.7)	83.5 ± 3.2; (77.0; 90.0)
Knee joint laxity	1.2 ± 0.3; (0.7; 1.7 )	1.3 ± 0.2; (0.8; 1.8 )	1.3 ± 0.3; (0.8; 1.8)	0.9 ± 0.3; (0.4; 1.4)	1.4 ± 0.3; (0.9; 2.0)	1.1 ± 0.3; (0.6; 1.6)

Power results are presented as least square mean ratios (ACL limb normalized to the presurgery value for the healthy limb multiplied by 100) ± SE (CI). Knee joint laxity results are presented as least square mean side-difference in mm ± SE (CI).
HRT: high-intensity resistance training; LRT: low-intensity resistance training. Significant between-group differences in regain of muscle power: ^∗𝑃=0.027, ^∗∗𝑃=0.006.