Learn how to identify and treat a muscle strain that leads to armpit pain. Get to know how to gauge severity and recovery timelines.

Shoulder stretches aren't just important before a workout. They can also help improve mobility and posture and lower your ...

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 ...

Like other parts of your body, your muscles change over the years. “As you age, your muscle fibers become less dense, which makes them less flexible and more prone to injury,” says Elizabeth Gardner, ...

Repeatedly doing the same type of activity — whether it’s running, lifting or sitting — can have serious downsides. By Hilary Achauer When you head out for your daily run, with each stride you’re ...

These exercises will help headaches, lower back pain, and neck pain that may be caused by less-than-ideal ergonomic setups.

How you breathe during strength training directly affects muscle engagement, core stability and power output. Dana Santas explains in the last of this five-part series.