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 focuses on keeping a consistent, moderate pace, while HIIT uses short bursts of hard work and short ...

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 ...

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 ...

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, ...

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

HIIT can help improve speed and power, but longer, steadier workouts that you can do regularly, like swimming and rowing, are better for cardio endurance.

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 ...

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

When it comes to carving out time to work out, many people believe an hour is necessary to really feel the muscle-quaking benefits of a good sweat sesh. That, my friends, is a piece of fitness fiction ...