People running marathon

It’s officially marathon season, with the London Marathon looming for the tens of thousands of people who’ve signed up for the feat.

And as Jan Lavis, an expert at We Run who has herself run 103 marathons, says, ”’The marathon starts long before the start line.”

“How you fuel in the days before your race can make a huge difference to your performance,” she continues.

“The most important thing is to stick to what you know, respect your body, and trust the training you’ve been putting in over the months leading up to race day.”

That involves your consumption of caffeine, a stimulant which many runners rely on to give them an energy boost through coffee or gels, and........

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