Eliud Kipchoge, arguably the greatest marathoner in the world right now, is often seen grinning during a race. Photo: Alamy

Smiling can improve running: how to make it genuine, such as thinking happy thoughts or listening to something upbeat

Singing, reminiscing about pleasant memories, thinking funny thoughts – all induce happiness which makes activities feel easier and can help performance, research shows. Frowning and grimacing, though, can do the opposite

Topic |   Health and wellness

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Eliud Kipchoge, arguably the greatest marathoner in the world right now, is often seen grinning during a race. Photo: Alamy
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