The astronaut faces a number of challenges when he competes in Sunday’s big race… in spaceToday,around 36000 people will be running the London Marathon but only one will be doing it in space. British astronaut Tim Peake will be in orbit aboard the International Space Station (ISS), strapped by bungee cords to a treadmill. He will be watching the RunSocial app on his iPad, and which will digitally recreate the route for him.Weightlessness is not kind to astronauts. The perceived lack of gravity deconditions the body in a number of ways. Muscle loss occurs because the body is not having to work to stand up just but more obscure changes to the nervous system are being recognised too.
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Source: theguardian.com