I tried the Norwegian 4x4 workout after seeing it go viral—and honestly? I feel fitter than ever

Nordic workouts aren't for the faint-hearted.
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What To Know About The Buzzy Norwegian 4x4 Method—And All It Can Do For Your Heart Health

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Like other HIIT-style workouts, the method contains spurts of high-intensity exercise and active recovery ...
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The Norwegian 4x4 HIIT workout is a favourite among athletes and actress Jessica Biel – here’s why it’s so beneficial

Lack of time is often the main reason people don’t exercise regularly. But a type of interval workout recently popularised by actress Jessica Biel could be the solution – with research showing it can ...