Presented by Athleta, this HIIT workout is basically a guaranteed confidence boost. Celebrity trainer Amanda Butler leads you through two different rounds of full-body interval training, helping you ...

Steady-state cardio may be more helpful for beginners looking to manage their weight, while HIIT is a great way to boost ...

High-intensity interval training is a workout technique that gets you a lot of bang for your buck. This type of workout serves as cardio and strength training, burning calories, boosting your ...

Ready yourself for this full-body 30-minute workout that combines Pilates, HIIT, strength, and cardio for a workout that will keep your body guessing. When it comes to carving out time to work out, ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Interval training is great for boosting cardiovascular endurance and promoting overall fitness. Our fitness expert, Judd NeSmith, NASM-CPT, PES and founder of Serious Fitness, explains interval ...

They’re so easy to incorporate into your week.

Advanced kettlebell HIIT combines explosive strength work with high-intensity cardio for a demanding full-body workout.

Welcome to Class Fitsugar's newest season! We're back in the studio, and our new trainer Natalie White will be leading you through a 30-minute cardio HIIT workout, joined by Paulyn Baens and Maya ...

Does cardio make it harder to reach a personal weight lifting record? Does lifting weights compromise your mile time? We ...

Swimming is a low-impact workout that also targets multiple muscle groups. “In just 30 minutes of swimming, an average person ...