Relationship of knee abduction moment to lower extremity segment accelerations during sport-specific movements in youth anterior cruciate ligament reconstruction patients at return-to-play
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Abstract
Background
Second injury rates after anterior cruciate ligament reconstruction are high, necessitating tools to identify injury risk factors prior to return to sport. Knee abduction moments are a predictor of anterior cruciate ligament injury but require access to a motion laboratory to collect, thus reducing clinical feasibility. Inertial measurement units have been explored as an efficient, lower cost solution. However, the relationship between linear acceleration, derived from inertial measurement units, and knee abduction moments have not been explored in youth athletes after anterior cruciate ligament reconstruction. Therefore, the purpose of this study is to assess the relationship between lower extremity segment acceleration, derived from wireless inertial measurement units, and knee abduction moment during athletic tasks in youth athletes after anterior cruciate ligament reconstruction.
Methods
Thirty-four participants (12 male, 15.0 ± 2.5 years) who were 10.1 ± 1.9 months post-anterior cruciate ligament reconstruction participated in the study. Participants performed a single leg hop, a run plant, and a 45° run cut task. Peak knee abduction moment was collected using optical motion capture and force plates while peak triaxial acceleration was collected for the lower extremity using inertial measurement units.
Findings
Moderate correlations were observed for thigh and shank linear acceleration and knee abduction moment across all athletic tasks. Observed differences in linear acceleration between limbs were also identified.
Interpretation
These findings support the use of linear acceleration, derived from wireless inertial measurement units, to supplement detection strategies of high knee abduction moment during athletic tasks in youth athletes after anterior cruciate ligament reconstruction.
期刊介绍:
Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field.
The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management.
A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly.
Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians.
The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time.
Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.