The bounce of the unsupported leg extending behind the Knee Platform is a common trait of the iWALK and has been present since its introduction in 2001. We refer to this phenomenon as “foot bounce." We have evidenced this foot bounce in motion capture studies but have found that it is very rare that this causes pain or discomfort.
With practice, most people automatically learn how to adapt their gait to mitigate the impact when the iWALK comes into contact with the ground. This impact is what causes foot bounce. One way to reduce foot bounce is to adapt your gait to take smaller steps and focus on reducing the impact when the crutch hits the ground.
Another possible solution would be to make sure you have properly adjusted the lower leg height adjustment. Having the lower leg height adjustment too low will increase the heel strike forces, which causes more foot bounce.
Although rare, some injuries will have discomfort or pain associated with foot bounce. Depending on the injury, an orthopedic boot can solve this problem, however, this is not always effective. In some cases, if foot bounce cannot be reduced, then iWALK will not work for that injury.