DEAR MAYO CLINIC: I am trying to get into shape for summer, and one area that has always been challenging has been my upper arms. Recently, though, I began a workout routine, but a friend warned me about the risk of injuries. Do you have any advice to avoid problems?
ANSWER: Having well-defined, muscular upper arms often is the goal of anyone seeking a fit and toned appearance. But there's more to these hardworking muscles than good looks.
The primary arm muscles include the biceps, the muscle in front of your arm, and the triceps, the one at the back. They do the heavy lifting when flexing or extending your arm and making twisting motions.
