Arms: they’re good for more than triumphant finish-line photos! Those non-leg appendages, which runners tend to ignore when it comes to strength training, can actually help you cross that line faster ...

To achieve a sculpted look with the upper body, you need a well-rounded routine made up of exercises that target every part of the arm, including the shoulders, triceps and biceps. Strong arms don’t ...

HIIT combines resistance with cardio which helps to improve intramuscular coordination, mitochondrial density, and ...

When you injure a section of your body, it will take some time to regain your full capabilities. You can, however, work with other muscle groups and body parts that are not injured, depending on the ...

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 ...