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The science of detraining and retraining: how quickly do you really lose and regain fitness?

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The science of detraining and retraining: how quickly do you really lose and regain fitness?

All of us endure periods off the bike, but how significant is the impact on physiology and performance? And how can you maintain fitness and return faster? Rouleur investigates…

By James Witts

Photography by Getty

24 JANUARY 2025 | UPDATED 12.35 PM BST

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Rouleur Issue 144 — The Tour Issue
In printIssue 144

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The Tour Issue

Le Tour de France: a race defined by colour, passion and history, whose drama and romance continue to shape the identity of cycling’s greatest stage.