[USMMA_83]

WOW! those are some amazing feet...technology...you gotta love it.

[Hardastarboard]

Yet Frasure points out that a prosthetic foot is far less powerful than a natural limb. The prosthetic returns about 95 percent of the energy put into it when "loaded," whereas the muscles in a human leg will return more than 200 percent, he explains. Biomechanical engineers agree, but if you add the adjustable-height factor, suddenly the calculation becomes more complicated.

It may be also that these prostheses are lighter than a natural leg, allowing the athlete to achieve a higher leg speed (stride speed).

[Fam4Bush]

Great Thread...

How wonderful it must feel for him to have such mobility, and how promising for others who have lost theirs...