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What is Heart Rate Variability? How important is it for cycling?

We take a deep dive into a trendy, but often misunderstood metric in endurance sports

By Nick Busca

Photography by Getty Images; SWpix; Alejandro Javaloyes; Jasmijn Muller

1 FEBRUARY 2022 | UPDATED 11.39 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.