Zone 2 Training: The 80/20 Rule Behind Britain’s 2026 Marathon Boom – and the Maths That Fails Anyone on Three Hours a Week
This piece has been folded into our fuller, regularly updated guide to the same question: Zone 2 Training UK 2026: Why Britain’s Fittest Runners Are Deliberately Going Slower.
Everything covered here – where the 80/20 rule comes from, the arithmetic for runners on three hours a week, the fat-burning zone myth, why your watch is guessing, and who should train slow this autumn – now lives in that guide, alongside the science, the kit costs and who actually benefits.
