They claim it saves energy by about , dont quaote me 30%.Basically you are using gravity to run , not fighting it. He gave a kangaroo as an anology, the more it springs the less energy it loses.
They claim it saves energy by about , dont quaote me 30%.Basically you are using gravity to run , not fighting it. He gave a kangaroo as an anology, the more it springs the less energy it loses.
Pain lasts a only a minute, but the memory will last forever....
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