Building fitness for the long term

The Endurance Journey

In a world that loves big moments and bold goals, it’s easy to treat fitness like a single project: train hard, peak, perform, move on. But most of us don’t really want a one-time result. We want to feel strong across years and even decades.

That’s what this edition of Polar Journal is about: the endurance journey. Inside, you’ll find stories and science that celebrate building fitness for a lifetime.

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