iWalk Powerfoot video Army
Here in this video our keen eye was correct regarding the reduction in ankle rocker and subsequent heel rise. The video when the soldier is walking down the stairs (most notable for on the last step) gives an excellent example of what happens when ankle rocker (tibiotalar dorsiflexion) is impaired (this can look like another clinical condition called FootBaller’s ankle if a spur develops). See how much knee lift he has to generate, forced by the early heel rise. Once again, still an amazing piece of engineering.
(* If the fabricators are reading this, we are here to help ! Start by moving that metal bar at the front of the “mortise” another few millimeters forward and you will get the extra few degrees to reduce that rocker/heel lift issue. This will smooth out mechanics at the hip and knee and add to user stability and balance.)