Abstract Summary
Anterior shear forces and valgus moments at the knee expose the anterior cruciate ligament (ACL) to high loads. Knee joint loads are largely produced by muscles, but the contribution of individual muscles to knee joint loads during potentially injurious movements, such as single leg landing, is not fully understood. Individual muscle force contributions to the knee joint anterior shear force and valgus moment during single leg drop landing were investigated in 8 healthy males using an electromyography-informed musculoskeletal modelling approach. Anterior shear forces were primarily produced by the quadriceps and gastrocnemius, and opposed by the soleus and hamstrings. Valgus loading was primarily induced by the quadriceps and plantar-flexor-invertors, and opposed by the gluteus medius and minimus and the soleus. This data can be used to inform preventative and rehabilitative interventions.
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