Can exercise help with paget's disease symptoms?

Talk with your doc. Exercise is very important for bone and joint health. Low impact activities such as cycling and swimming are probably best. Work out a exercise program with your doctor as everyone's situation is different.
Yes. One of the key elements is exercise. When we are dealing with pain in paget's disease, keep in mind, supervised exercise plan by your doctor, avoid weight gain to decrease pressure on weight bearing joints and bones, keep the joints active and pain free as possible, avoid extra pain sources such as muscle stiffness, be prepared for any activities and try to avoid sudden turns and moves.