Kettlebells have become a staple in home gyms and fitness studios across the country, and for good reason. These cast-iron weights with handles offer a simple yet effective way to burn calories, build ...

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. Want to add some ...

When you think of core exercises, your mind might go straight to bodyweight crunches or situps. But your core is so much more than just your abs! It includes all of the muscles from your ribs to your ...