The Single Leg Hop Test (SLHT) is a series of tests that are done at a high intensity to determine if you as an individual are ready to return to sport. They are commonly used in the later stages of ACL rehabilitation and the test results will determine if you are ready to return to play or not. The types of single leg hops we can do to assess:
Single leg hop test
Single leg triple hop test
Single diagonal hop test (crossing over a line with every jump).
Timed single leg hop over 6m
In a clinical setting hop tests are extremely useful for identifying “isokinetic flexion strength deficits and flexion-to-extension ratios” ( Sueyoshi T, Nakahata A, Emoto G, Yuasa T, 2017) for individuals looking to return to their chosen sport. They also found that “hop tests are useful tools for a bilateral comparison of knee strength and function when returning athletes to their sport” (Sueyoshi et al.).
The Hop tests are used in conjunction with the Limb Symmetry Index (LSI) to compare from side to side. An article by Lapley (2015) showed that “Less than 85% via the Limb Symmetry Index (LSI) in knee extension strength is considered poor and warrants further rehabilitation (Lepley, 2015)”. Knee extension is primarily produced from the quadriceps muscle group, which goes through changes post ACL surgery. The tests also give us an idea of the bigger picture of if an individual is able to return to a sport that requires jumping, cutting as well as needing to stop/start quickly. We recommend being at least 90%+ before returning to sport at MAT.
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