This workout consists of four-minute bursts of exercise, done at 85 to 95% of your maximum heart rate. Afterwards, you get ...

If there’s one thing we know for sure, it’s that there is no shortage of killer cardio workouts. Between AMRAP workouts, rucking, and the viral 12-3-30 treadmill routine, people are constantly finding ...

Running is good. It’s quick, free and helps boost your fitness. If you want to use running to get in shape fast, one of the best ways to go about it is to use intervals. Say hello to the Norwegian 4x4 ...

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 ...

'Longevity workouts' and the best types of training to increase your lifespan seem to have gained more momentum in recent years. With the likes of billionaire Bryan Johnson experimenting with various ...

I first tried the Norwegian 4x4 workout a year ago, and since then, it has become a staple of my fitness routine. I don't do it every week (some folks do), but it's a workout I keep returning to ...

"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 ...