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.

Figure 1: Molecular characterization of the muscle-G4KO mice. Figure 2: Glucose uptake is reduced in muscle but is increased in liver in muscle-G4KO mice in vivo. Muscle-G4KO mice show fasting ...

Supplements for muscle growth (often called "ergogenic aids") may be used to help you "bulk up," improve athletic performance, or minimize aging-related muscle loss. Some supplements, like collagen, ...

Your first instinct is to pull your head toward your shoulder, trying to lengthen your stiff, sore muscles. We’ve all been told stretching is a great way to keep your body loose and limber and ...

Ms. Barclay is the climate editor at Times Opinion. I was lying on my side at physical therapy, halfway through a set of leg raises to strengthen a butt muscle gone soft, when a therapist ...