Do I need a special exercise program?

Good question. Everone needs an exercise program! how yours will differ from someone else's will depend on what you need. Your current heath status, underlying conditions, how good of shape you are in and your endurance. Talk to your doctor before starting something new so you will only gain and not suffer any harm!
Depends. On your heath status, shape you are in. When did you last exercise ? It is usually a good idea to discuss this excellent idea with your doctor to avoid any problems and keep a happier, healthier, you!