Now, before you go grabbing that pump, you’re going to want to make sure you have the right ball size on hand. To do that, all you need to know is your height. If you’re 5’5” or shorter, stick to a 55 ...

A simple tweak to your curl form—plus the instability of a fitness ball—can seriously elevate your biceps routine.

Stability balls—also known as exercise, fitness, or Swiss balls—are a home-gym staple. But more often than not, they end up sitting useless in the corner of spare rooms, deflated in closets, or ...

Editor’s note: This is the first installment of an eight-week series geared toward helping Renew readers prepare their bodies and minds to return to normal life this summer, as the pandemic wanes.

Begin in a plank position with your feet on the stability ball. Draw the belly button in toward the spine and exhale as you pull your knees toward your chest. Slowly extend the legs to the starting ...