Get step-by-step instructions for chair exercises for arms that build strength, improve mobility, and support everyday ...

Unexplained muscle pain in the arms and legs may be the result of benign issues. Or it may point to a more serious underlying condition, such as fibromyalgia, infection, or thyroid issues. Muscle pain ...

Your little one is moving and grooving and learning more about how their body works with each passing day. Some of your infant’s movements may seem organized; others, not so much. Arm flapping may ...

You don’t need fancy equipment to tone and strengthen the muscles in your arms. Body weight exercises like planks, pushups, and arm circles can help you get the job done anytime, anywhere. Arm ...

Are toned arms one of your summer goals? Well, here's some good news: If you start committing just five minutes a few days a week now, you can see some serious results in a few months. These exercises ...

The way our arms swing when we walk doesn’t seem to make much sense. We don’t need to move our arms to move our legs, so why do it? It’s a question that’s long bothered scientists, whose theories ...

This story was originally published on Nov. 13, 2015. It was updated and republished on Sept. 6, 2019. Additional reporting by Kara McGrath and Audrey Noble. Full disclosure: I've been shaving my arms ...