Hyperextension of the Knee (Genu Recurvatum)

Genu recurvatum is defined as excessive backward motion during active knee extension. This “knee hyperextension” may be an isolated finding or part of a generalized multidirectional joint instability.


The prevalence of joint hypermobility affecting a few joints is substantial. One study showed that 18% of healthy subjects had at least one lax joint and 11% had three or more lax joints. The prevalence of generalized joint hypermobility varies from 10% to 30% and tends to decrease with age. Congenital genu recurvatum is a rare malformation with knee ...

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