The Effects of High-Intensity versus Low-Intensity Resistance Training on Leg Extensor Power and Recovery of Knee Function after ACL-Reconstruction
Table 2
Baseline characteristics of the participants 1-2 weeks before ACL-reconstruction.
Variable
HRT-group
LRT-group
value
Number ()
24
26
Age (year)
0.976
Sex: M/F ()
15/9
16/10
0.994
Body weight (kg)
0.754
Graft: BPTB/STG
13/11
14/12
0.982
Months from injury to surgery
0.043
Meniscus tear ()
11
13
0.877
Repair with arrows
5
6
Resection, current/previous
6
7
Cartilage damage ()
7
10
0.448
Leg extensor muscle power
Ratio ACL/healthy limb %
0.814
Knee joint laxity
Diff. ACL and healthy limb (mm)
0.184
One-legged single hop
Ratio ACL/healthy limb %
0.077
One-legged triple hop
Ratio ACL/healthy limb %
0.367
Tegner activity scale (0–10)
3 (2–5)
2 (2–4)
0.292
Lysholm score (0–100)
70 (52–83)
66 (56–81)
0.771
KOOS (0–100)
Pain
85 (67–94)
79 (67–90)
0.514
Symptoms
89 (70–96)
80 (62–90)
0.131
ADL
93 (75–97)
89 (79–97)
0.936
Sport
70 (49–76)
60 (40–81)
0.499
QOL
44 (38–56)
44 (36–50)
0.467
Data are reported as mean ± SE except self-reported surveys, which are presented as median (interquartile range). HRT: high-intensity resistance training; LRT: low-intensity resistance training; BPTB: bone-patellar tendon-bone graft; STG: four-legged semitendinosus-gracilis graft; KOOS: knee injury and osteoarthritis outcome score with subscales (0: extreme symptoms, 100: no symptoms): pain, other symptoms, ADL: function in daily living, sport/rec: function in sport and recreation, and QOL: knee-related quality of life.
