Single-leg assessment of postural stability and knee functional outcome two years after anterior cruciate ligament reconstruction

Ann Phys Rehabil Med. 2009 Jul;52(6):475-84. doi: 10.1016/ Epub 2009 May 23.
[Article in English, French]


Objective: To analyse postural stability and the single-leg hop for distance in subjects 2 years after anterior cruciate ligament reconstruction (ACLR), in comparison with an age- and activity-matched control group.

Design and setting: Subjects reported to a sports medicine or athletic training research laboratory for testing.

Subjects: Twenty-six subjects having undergone ACLR and 26 age- and activity-matched controls were selected to participate in this study. An arthroscopically-assisted, central, one-third bone-patellar tendon procedure was used to repair the ACLs.

Measurements: One-leg stance postural stability was measured with the NeuroCom Balance Master platform system. We recorded the single-leg hop for distance as an objective measure of function.

Results: We found a significant difference (p<0.05) between the ACLR and control subjects in terms of the one-leg stance sway velocity (knee fully extended) on the operated side.

Conclusions: After ACLR (mean time postoperatively: 24+/-1 months), single-leg hop for distance score was normal, when compared with the contralateral limb. Our results indicate that 2 years after surgery, single-limb postural stability in the ACLR group differed significantly from that in the control group. The persistence of poor stability control may be correlated to an impairment in proprioception.

MeSH terms

  • Adult
  • Anterior Cruciate Ligament / surgery*
  • Arthroscopy
  • Athletic Injuries / surgery
  • Case-Control Studies
  • Follow-Up Studies
  • Humans
  • Knee / physiopathology*
  • Leg / physiopathology*
  • Locomotion
  • Male
  • Mechanoreceptors / physiology
  • Patellar Ligament / surgery
  • Postoperative Complications / diagnosis*
  • Postoperative Complications / etiology
  • Postoperative Complications / physiopathology
  • Postural Balance*
  • Reconstructive Surgical Procedures*
  • Recovery of Function
  • Sensation Disorders / diagnosis*
  • Sensation Disorders / etiology
  • Sensation Disorders / physiopathology
  • Treatment Outcome
  • Young Adult