Watch: If you don’t exercise in space? Scott Kelly explains what it does to your heart, bones and brain

Watch: If you don’t exercise in space? Scott Kelly explains what it does to your heart, bones and brain

The former NASA astronaut said that skipping exercise in space can cost 1 per cent of body mass every month and can eventually lead to complete loss of weight and bone mass to a point where even the skeleton can turn into a “gumby toy”

Former NASA Astronaut Scott Kelly