It’s the last day of London 2012, and Mo Farah is presumably still celebrating his 5,000 m win, coming only a week after the 10,000 m win, making him the first man to win both golds for Team GB. So, what’s behind the science of running? Exercise triggers the release of brain derived neurotrophic factor (BDNF). As BDNF helps the brain develop, it’s possible that as we evolved and began to pursue prey over long distances on foot, then the increased levels led to us developing bigger brains. So – exercise can keep your brain fit as well as your body!

Olympic Games 27 July – 12 August

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