Insights by XMILES

A half marathon demands respect. It is far enough to drain your energy stores if you get it wrong, yet fast enough that every fuelling decision can influence your performance. For most runners, you are looking at 90 minutes to...

A half marathon sits in that sweet spot. Long enough to expose poor fuelling, short enough to tempt you into taking risks. At 13.1 miles, most runners will be out on course for 1 hour 20 minutes to 3 hours....

The Windermere Marathon is not your typical road marathon. With rolling hills, sustained climbs, and some of the most beautiful scenery the UK has to offer, this is a race built around experience rather than chasing a personal best. An...

Fuelling for the 13 Valleys Ultra is about more than just carbs per hour. This is an event that combines long distance, big elevation, technical terrain, night running and unpredictable Lake District weather and for 2026, XMiles are the Sports...

For 2026, XMiles are the Sports Nutrition Retail Partner of The Great North Swim at Windermere, one of the UK’s most iconic open water swimming events. With distances ranging from a 250m splash to a demanding 10km endurance challenge, it...

Performing well in hot conditions is one of the biggest challenges endurance athletes face. To better understand how athletes can prepare for and manage heat stress, FLYCARB partnered with CORE to explore whether sodium bicarbonate supplementation can improve performance in...