Diet, Exercise and/or Rosiglitazone for HIV-Associated Insulin Resistance

The purpose of this study is to determine if, in men and women with excess abdominal fat and insulin resistance, people with HIV infection respond differently than people without HIV to interventions that typically improve body fat distribution and insulin resistance. The specific interventions are: 1. Diet + exercise program. 2. Rosiglitazone treatment. 3. A combination treatment of diet + exercise program and rosiglitazone.