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 ...

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 ...

You don't need a full hour to get in a good workout. In fact, in just 30 minutes, you can torch calories, burn fat, and build muscle all at the same time. These workouts are a little bit of everything ...

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 ...

Discover how much cardio you really need in your 20s, 30s, 40s and beyond to boost heart health, build fitness and support longevity at every stage of life.

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 ...

It’s simple math: If you don’t run and then you start running, you’re probably going to lose weight. That’s because, to boil it down in an oversimplified way: “Weight loss is a matter of calories in ...

Runners, you've gotta lift. And lifters, sets of 10 do not count as cardio.