The elbow is a complex intersection of three bones - the humerus in the upper arm and the ulna and radius of the forearm - that enables extension, flexion and rotation and facilitates the function of the hands. It's also prone to injury from poor form in any sport that requires a strong grip, such as golf or tennis.
Exercises to strengthen your forearms can be helpful, both to promote recovery and to prevent future problems. As you do the following exercises, pay attention to your form and the position of your wrists. Do three sets of each exercise, working up to 20 reps or muscle exhaustion. If you're injured, start with light weights and increase as your strength improves. Swap arms after each exercise.