 “The capacity to rapidly adapt to changing gravitational environments is increasing in importance as NASA targets having the capability to send humans to Mars in the 2030s (U.S. National Space Policy, 2010).” Weightless gravity environments create the need for new postures and movement dynamics, as well as a shift in the way sensory stimuli are processed.Crews generally adapt to these conditions over a few days.When they subsequently return to Earth, however, and experience Earth-gravity