What happens to the body during a Marathon

by: Olympic     Published on: 20 April 2015

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Emma Ross, Head of Physiology at the English Institute of Sport, explains what happens to the body while running a marathon. Subscribe to the official Olympic channel here: http://bit.ly/1dn6AV5Find more about the Olympic Games at http://www.olympic.org/olympic-gamesFollow your favourite athletes on the Olympic Athletes Hub: http://hub.olympic.org/