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. While plenty of ...

Learning to engage your core and glutes doesn’t just protect your lower back from injury; it will also help you feel an exercise in all the right places. After all, if you don’t use a muscle, how do ...

If you’re new to calisthenics, it’s a form of strength training that uses just your body weight as resistance. Instead of spending hours in the gym curling a dumbbell to work your bicep, with ...