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XNRG 2022 events now open for booking!

Happy Christmas


  • One week left to earn your virtual ultra
  • Get 2018 off to a flying start
  • Achieve your goals through coaching
  • Prepare for UTMB success
  • Putting the high fat-low carb theory to the test

Welcome to your December XNRG update. What a year. We've loved seeing you at our events. There's still time to squeeze in a last ultra, or fill your diary for the year ahead. Book your next adventure >


Don't miss all the merriment of our first virtual ultra - the perfect way to round off your 2017.

Keep competing this Christmas

Run, jog or walk 50km over a single day (midnight to midnight) between now and Christmas Eve to bag yourself a special SVUC medal and festive buff. It's easy: pay £19 to enter, then connect your GPS devices to Strava and our results tables.

Join the fun >



We've got plenty lined up for the year ahead - places go fast!

Round the Island and Devil's Challenge

Humanity Direct Amersham Ultra

10th March | Amersham

A one-day, 31-mile free-to-enter ultra raising money for life-changing operations for children in developing countries. Equally perfect for first timers or as the last long run for Marathon des Sables competitors, it's one not to miss. Book now >

The Devil's Challenge

5 - 7th May | Winchester - Eastbourne

Perfect for anyone training for the Marathon des Sables, this three-day, 97-miler passes the legendary Devil's Dyke. Ideal for anyone preparing for the South Downs 100, you'll cross one of England's newest national parks in all its daytime glory. Book now >

Snowdon Training Weekend

8 - 10th June | Snowdonia National Park

Get UTMB ready! This is an ideal opportunity to get some ascending and descending training in your legs and test Alpine kit ahead of race week. Book now >

Round the Island

7 - 8th July | Isle of Wight

Soak up all the excitement of Cowes Week with our popular race around the Isle of Wight coastal path. Book now >



With XNRG coaching, we'll get you there

XNRG Coaching

Whether you're facing your first or your 100th ultra, our experienced coaches are on hand to help you achieve your ultra dreams. And, with our *NEW* coaching offers, getting started is even more affordable...

Give the gift of great racing

Perfect for anyone looking to take their ultra running up a step, our new Christmas coaching vouchers are available in £25, £50, £75 and £100. Not long left to buy - email Andy to get yours >

Simple Start

Looking for some quick advice, or interested in trying out coaching before committing? Book a 30 minute call with our head coach Andy for just £49. Email Andy now >



Alps Training Seminar - Get UTMB Ready

Join us in Chesham for a day of UTMB experts sharing their knowledge, experience and tips for the biggest ultra trail race week of the year.

More than 50% of British competitors don't cross the finish line for events they start in UTMB® week. We want to change that, by making sure you have the right knowledge to prepare, the right kit, and - more importantly - the right expectations when heading to the Alps.

Our 2017 seminar had great feedback - and 85% of attendees finished their races during event week.

Book your place >




Fat for fuel

A few years ago, XNRG's Head Coach Andy Mouncey decided that the only way to get to the bottom of the High Fat-Low Carb debate was to experience it directly.

He committed to a strict 14 day diet reset without carbs or sugars - here he gives his account of days two to nine. Read Andy's blog >

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