On especially busy days when you don’t have a lot of time to work out, you want to be able to get your cardio and strength training done all at once. That’s where these cardio core exercises come in, ...

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 ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. I first tried the ...

Depending on your fitness level, you can use this to get started or give yourself an easy day. This workout gets the heart pumping and works the entire core system (from hips to shoulders), which is ...

"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 ...

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 ...