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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 ...

When you're trying to burn fat, there's one form of exercise you'll start hearing a lot about: high-intensity interval training, or HIIT. These cardio exercises should be done all-out, as hard as you ...

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 ...

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 ...

From sprints to incline walking, the data shows which workouts burned the most fat – and it's good news for runners ...

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

After years of doing cardio and HIIT classes, I'm trying to incorporate more strength training into my fitness regime as I want to build some muscle (and have next to none). My question is: If I carry ...