What exercises can I do to strengthen my back?
Some specific exercises can help your back. One is to gently stretch your back muscles. Lie on your back with your knees bent and slowly raise your left knee to your chest. Press your lower back against the floor. Hold for 5 seconds. Relax and repeat the exercise with your right knee. Do 10 of these exercises for each leg, switching legs.
While some exercises are specific for your back, it's also important to stay active in general. Swimming and walking are good exercises to improve your overall fitness.