Heard the words “Norwegian 4x4” while refilling your water bottle at the gym or on social media recently? You’re not imagining things - this high-intensity interval training method has become the talk ...

What if a short 30-minute workout could not only make you fitter but also add years to your life? Since a high VO2 max has been linked to a longer lifespan, workouts that are particularly effective at ...

"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 ...

Olav Aleksander Bu, left, is a renowned coach to elite athletes such as Norwegian triathlete champion Kristian Blummenfelt (right).Courtesy of CORE/Santara Group Olav Aleksander Bu is an elite ...

What if a short 30-minute workout could not only make you fitter but also add years to your life? Since a high VO2 max has been linked to a longer lifespan, workouts that are particularly effective at ...

Every so often, a new type of workout seemingly takes the fitness world by storm. The latest in this long line of buzzy fitness fads: the Norwegian 4x4 workout, a high-intensity interval training ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? Like other HIIT-style workouts, the method contains spurts of high-intensity ...