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. High intensity ...

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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 ...

The American Heart Association recommends that adults get "at least 150 minutes per week of moderate-intensity aerobic activity or 75 minutes per week of vigorous aerobic activity" — or a combination ...

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 ...

If you're looking to step up your shape-up game, this 30-minute cardio interval plan she shared with us is a great way to boost the fat burn and tone the lower body. The workout is simple — after a ...

This workout mixes fast interval cardio via the bike, elliptical glider or running. (This isn't easy to do on a treadmill.) Start Five minutes Tabata, five minutes lift. Take five minutes to do the ...

Sticking with a workout plan is one of the most challenging aspects of achieving weight-loss goals. Often, the biggest ...