yes, tendons, ligaments and even muscles are used to recapture energy as animals locomote. about 30% for walking is what i seem to remember from my grad school

yes, tendons, ligaments and even muscles are used to recapture energy as animals locomote. about 30% for walking is what i seem to remember from my grad school days. ggreer above shows some real hubris and a deep ignorance of the ingeniousness of biological systems compared to human-created ones. a brain (and nervous system) is miraculous in its ability to gather, assess, store and discard ambiguous and contradictory information at astonishing rates.