Ergogenic aids promise runners an extra edge. But do they actually work?

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Hard training could be affecting your gut health – here’s how to protect it during intense exercise

Lighter doesn’t always mean faster. Rob Kemp investigates why muscle and fuelling matter much more than the number on the scales

Is collagen the answer to brighter, bouncier skin or yet another empty, expensive promise best left on the shelf ? Shannon Peter investigates

According to a new study, cramming carbs on the morning of a big run is a futile plan