We all have that friend who packs on muscle like it’s nothing, while the rest of us slog through our training week after week. Genetics explain some of the difference, but new research suggests your ...

Your deltoid muscles make up a main muscle group in your upper body. They’re connected with many other muscles and bones in your upper back, neck, and shoulder region and are extremely mobile. They ...

Katia Riddle is a correspondent at NPR covering mental health. She has reported extensively on the impact of events such as Hurricane Helene, Los Angeles wildfires and the loneliness epidemic. Prior ...