For example, studies on astronauts in space have indicated a 2 percent loss of muscle mass per week, and the average loss of bone density is 1 percent per month! How humans would look after 700 years is, in the end, pure conjecture, but based on these well-known effects of microgravity on the human body, we could make a guess. The combined effects of microgravity, combined with lack of exercise, leads to humans that have atrophied limbs, less muscle, yet larger body mass. Finally, even if the âfuture humansâ could manage to stand upright, Earthâs gravity would cause blood to pool in the lower legs and the deconditioning of the cardiovascular system would make it very difficult to regulate blood pressure, resulting in these âfuture humansâ fainting, and as they hit the ground, easily break a bone. If you want to see first hand the effects of space flight on the ability to regulate blood pressure, watch this video ( CLICK HERE ). From a science perspective, humans returning from a long space flight, experiencing severe disuse atrophy of bone and muscle as well as cardiovascular dysfunction, would have a hard time standing and walking–so some of the visuals in the movie have both literal and metaphorical meaning—really great stuff. read more
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