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Tim Peake says this is the hardest thing about running a marathon in space

Dina SpectorApr 24, 2016, 15:27 IST

British astronaut Tim Peake is running the London Marathon from space.

The 44-year-old tweeted this picture, from 250 miles up, on Sunday morning.

Peake told the Associated Press that one of the biggest challenges of running a 26.2-mile race on the International Space Station is the harness he wears to keep his feet on the treadmill in weightlessness, which rubs his shoulders and waist."It's a great challenge that I set myself, and I'm quite glad this is happening later on in the mission," Peake told the AP.Peake, who arrived at the ISS in December, told the publication that he wants to finish the marathon in under 4 hours.

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