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Weight loss, weight gain, and weight maintenance can be simply explained by calories "in" versus calories "out". If you consume more calories than you burn, then you will gain weight. It is a simple explanation, but not always a complete one. There are many factors that can cause obesity. Causes of Weight Gain The following factors, either alone or in conjunction with one another, can contribute to weight gain and obesity. To learn more about how to deal with obesity-related health concerns, consult a weight loss surgeon to discuss your options. High-calorie/ high-fat diet - Typically overweight and obese people consume far more calories than their body needs. Inactivity - The lack of physical activity in the lives of sedentary men and women keep them from burning the calories necessary to offset the amount of calories consumed. Medications - Certain medications, including some corticosteroids, antidepressants, high blood pressure prescriptions, and antipsychotic medications

Bariatric surgery is not something you do without being properly prepared. It is important to follow your bariatric surgeon's instructions prior to surgery. Another important part of preparing for weight loss surgery is making sure that you are mentally prepared for the potentially life-changing results of the surgery. Many times all of the testing, screening, and securing of payment, especially from an insurance company, can take some time. However, you need to be sure to take the steps necessary for your weight loss surgery. Pre-surgical Instructions for Bariatric Surgery Prior to having bariatric surgery, you will most likely have to undergo several tests. Below are some of the common pre-bariatric surgery tests that will help determine if you are a LAP BAND surgery candidate: complete blood count (CBC) urinalysis chemistry panel glucose tolerance test (to check for diabetes) chest x-ray electrocardiogram (EKG) gallbladder ultrasound pulmonary function test