Like an athlete preparing to run a marathon, candidates for weight-loss surgery who decide to have surgery need to get themselves “in shape” for the operation. This includes physical, behavioral and social preparation.

Physically, you’ll need to do everything you can to improve your health, which will reduce the risks of the surgery. In our program, we require a modest weight loss (approximately 10 percent) prior to surgery. This reduces the size of the liver, which makes it easier for the surgeon to see and work during the operation.

You should also increase your physical activity and obtain a full medical clearance. If you smoke, quit several months before surgery to reduce respiratory complications and improve wound healing. If you have sleep apnea, get comfortable using a home breathing device while sleeping.

Prepare to change your lifestyle. This includes changing your eating habits, incorporating different techniques for dealing with stress and preparing for the changes in body image. Shop for foods and other supplies you’ll need after surgery, and remove sweets and junk food from your home. Attempt to make the necessary postsurgical adjustments before surgery so the transition will be smoother.

Socially, prepare yourself for issues that may arise after surgery related to family interactions, friendships, relationships, jealousies, intimacy and even sabotage. Working with a trained behavioral therapist can be invaluable.