Before revision: The Origins Since the late eighties, during long-duration space travel, was placed as a problem as the ability to maintain power the muscles of astronauts engaged in missions, given that the absence of gravity led to an environment in which they operated ipotrofismo of the musculoskeletal system, no longer called to support the load of the body weight, as well as a reduction in bone mineral density.
After revision: The Origins Since the late eighties, during long-duration space travel, was placed as a problem as the ability to maintain power the muscles of astronauts engaged in missions, given that the absence of gravity led to an environment in which they experienced atrophy of the musculoskeletal system, no longer called to support the load of the body weight, as well as a reduction in bone mineral density.