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How to do 4x4 intervals

If you're able to train 30 minutes couple of times a week 4x4 intervals will give good results.

How to do 4x4 intervals

Speed intervals are the best

Looking for the perfect running session? Here’s an interval session that works just as well all year round, and both indoors and outdoors.

Speed intervals are the best

Choose cross country ski poles for your needs

We have cross country ski poles for all levels: from beginner to world champion. Here you will find a guide to help you choose the right ones.

Choose cross country ski poles for your needs

Birken NO

Our waxing tip for Birkebeinerrennet 2026.

Birken NO