Variability in leg muscle power and hop performance after anterior cruciate ligament reconstruction
- 8 February 2012
- journal article
- clinical trial
- Published by Wiley in Knee Surgery, Sports Traumatology, Arthroscopy
- Vol. 20 (6), 1143-1151
- https://doi.org/10.1007/s00167-012-1912-y
Abstract
The purpose of this prospective study was to describe the variability in leg muscle power and hop performance up to 2 years among patients following ACL reconstruction and specifically to illustrate the effects of various criteria for an acceptable level of muscle function. Eighty-two patients (56 men and 26 women) with a mean age of 28 years, who underwent ACL reconstruction using either hamstring tendons (n = 46) or a patellar tendon (n = 36), were assessed pre-operatively and 3, 6, 12 and 24 months post-surgery with a battery of three lower extremity muscle power tests and a battery of three hop tests. Leg symmetry index (LSI) values at group level ranged between 73 and 100% at all follow-ups. When the tests were evaluated individually, patients reached an average LSI of ≥90% at 24 months. The success rate at 24 months for the muscle power test battery, that is, patients with an LSI of ≥90% in all three tests, was 48 and 44% for the hop test battery. The success rate at 24 months for both test batteries on all six muscle function tests was 22%. The criterion of an LSI of ≥80% resulted in 53% of the patients having an acceptable level on all six tests, while with a criterion of an LSI of ≥100%, none of the patients reached an acceptable level. At group level and in single muscle function tests, the muscle function outcome 1 and 2 years after ACL reconstruction is satisfactory in the present study and on a par with the results presented in the literature. However, when using more demanding criteria for a successful muscle function outcome, using batteries of tests or increasing the acceptable LSI level from ≥90% to ≥95% or ≥100%, the results are considered to be poor. It is suggested that this should be taken into consideration when presenting results after ACL rehabilitation, deciding on the criteria for a safe return to sports, or designing rehabilitation programmes after ACL reconstruction. Prognostic prospective cohort study, Level I.Keywords
This publication has 54 references indexed in Scilit:
- Quadriceps muscle weakness after anterior cruciate ligament reconstruction: A risk factor for knee osteoarthritis?Arthritis Care & Research, 2010
- Does the Graft Source Really Matter in the Outcome of Patients Undergoing Anterior Cruciate Ligament Reconstruction?The American Journal of Sports Medicine, 2010
- Preoperative quadriceps strength is a significant predictor of knee function two years after anterior cruciate ligament reconstructionBritish Journal of Sports Medicine, 2009
- Muscle strength and functional performance in patients with anterior cruciate ligament injury treated with training and surgical reconstruction or training only: A two to five‐year followupArthritis Care & Research, 2008
- Rehabilitation and recovery after anterior cruciate ligament reconstruction: patients' experiencesScandinavian Journal of Medicine & Science in Sports, 2007
- Knee kinematics and kinetics in former soccer players with a 16-year-old ACL injury – the effects of twelve weeks of knee-specific trainingBMC Musculoskeletal Disorders, 2007
- The Influence of Frequency, Intensity, Volume and Mode of Strength Training on Whole Muscle Cross-Sectional Area in HumansSports Medicine, 2007
- The effects of proprioceptive or strength training on the neuromuscular function of the ACL reconstructed knee: a randomized clinical trialScandinavian Journal of Medicine & Science in Sports, 2003
- Risk factors for lower extremity injury: a review of the literatureBritish Journal of Sports Medicine, 2003
- Is it Possible to Prevent Sports Injuries?Sports Medicine, 2001