Tim Peake at EAC

ESA astronaut Tim Peake at the European Astronaut Centre in Cologne, Germany.

Get ready, set, go! As the thousands of runners start the London marathon this April, British ESA astronaut Tim Peake will run the full 42 km distance on a treadmill in the International Space Station.

Just as on Earth, exercise is very important for astronauts. Floating in microgravity they need to exercise up to two hours every day to counteract the effects of living in weightlessness.

Tim will strap himself to the T2 treadmill in the Tranquility node and start running at the same time as over 30 000 joggers set off at 10:00 GMT on 24 April in London.