Øyvind Sandbakk

The magic behind the medals

The most successful winter Olympian ever opened nearly two decades of training logs to researchers to shed light on how she achieved her goals. Now researchers have looked at two methods she used for her high-intensity training sessions to see how they compare.

Four World Cup gold medals — and a baby

Marit Bjørgen was a world-class athlete at the top of her career — and then she decided to have a baby. How did that change her ability to train — and her performance afterwards?