THE RUNNER'S JOURNAL Join the journal

The Runner's Journal

aerobic fitness

9 SURPRISING REASONS YOUR VO2 MAX IS DROPPING – EXPLAINED
Recovery 17 min read

9 SURPRISING REASONS YOUR VO2 MAX IS DROPPING – EXPLAINED

Why is your VO₂ max decreasing? Discover how heat, fatigue, detraining, weight, ageing, altitude and watch errors can make your score fall. Your watch gave you a VO₂ max of 52 last month. Today, it says 49. You have not stopped running. You may even be training more. Yet according to the number on your […]

VO2 MAX FOR RUNNERS: WHAT YOUR SCORE MEANS AND HOW TO IMPROVE IT
Training 10 min read

VO2 MAX FOR RUNNERS: WHAT YOUR SCORE MEANS AND HOW TO IMPROVE IT

VO2 max for runners explained: learn what your score means, how accurate watch estimates are and how easy runs, intervals and recovery can improve it. VO₂ max is often treated as the ultimate score for running fitness. Watches display it, training apps track it and runners compare it – but the number is only useful […]