Table 2

Muscle strength, physical performance test results and proportion of patients with LSI≥90% in each test (n=87)

Exercise alone (n=42)Exercise +ACLR (n=45)p ValueProportion of Individuals with LSI ≥90%*
Muscle strength†
 Quadriceps, n=69 LSI (%)100 (3)100 (3)0.9269 (87)
 Hamstrings, n=58 LSI (%)100 (0)100 (6)0.1955 (83)
Functional performance
 One-leg hop, n=82
 Injured leg (cm)148 (44)152 (40)0.23
 LSI (%)100 (7)99.3 (7)0.2190 (95)
Square-hop, n=81
 Injured leg, no35 (9)36.5 (12)0.39
 LSI (%)100 (12)104.4 (9)0.6880 (86)
Vertical hop, n=42
 Injured leg (cm)24 (12)28 (16)0.48
 LSI (%)98.8 (12)93.3 (21)0.0836 (74)
One-leg balance, n=82
 Injured leg (s)43 (40)32.5 (44)0.80
 LSI (%)100 (50)100 (53)0.4276 (80)
One-leg rise, n=83
 Injured leg (cm)‡85 (20)84.5 (20)0.57
 LSI (%)100 (0)100 (4)0.2384 (90)
Test battery, n=74 (LSI≥90% in all 4 tests) n (%)25 (68)27 (73)0.6160 (70)
  • Values are the median (IQR) unless otherwise indicated.

  • *Presented as proportion of total (n=87) study sample (proportion of those who performed the test).

  • †Absolute values are not presented since two methods were used to assess muscle strength at testing sites.

  • ‡Test values were transformed by subtracting the result from 100, giving a new scale with best result=100, worst result=0.

  • ACLR, anterior cruciate ligament reconstruction; LSI, leg symmetry index (injured leg divided by non-injured leg×100).