I've seen robots use brushless motors as replacements for springs, but with an adjustable spring constant. I wonder whether motorized jumping stilts would be practical. The motors could also add some power to your jumps.
Does the motor add force, or absorb force to regenerative-braking-->energy?
A fly-wheel-compression system on a brushless alternator would be an interesting addition to a spring-ish based stilt-prosthetic. Let it pump an alternator in the unit to create power for all the gear over time/distance?
