Abstract Summary
Limb symmetry indices during single-limb hop tasks and counter-movement jumps are often used as screening tools for evaluating knee joint function in injured populations, although no evidence exists to support their use in a paediatric population. We sought to determine whether clinically significant differences were present in a paediatric population with confirmed ACL-ruptures. Few differences were found in performance, kinetic, or limb symmetry index variables. The use of these tests for determining knee joint function should be re-considered.