How FLATOUT Is Bringing a Different Fitness Challenge to London in 2026 London's fitness calendar is getting another race format to consider in 2026. FLATOUT combines running with functional workout zones, giving active exercisers a structured challenge built around repeated 500-metre runs and eight different stations. For someone who already trains in the gym or mixes running with strength work, the format offers a clear question to work towards: how does your training hold up when the running and functional work keep coming back? Read more: https://shorturl.at/U5Fow