This study will determine how fat metabolism is different between well-trained athletes, sedentary individuals and those who are obese. Participants must be between the ages of 25 and 45, and have been distance training for a minimum of six months. The study will require a one-half day screening and two overnight stays at the Mayo Clinic General Clinical Research Center at Saint Marys Hospital. Participants will receive information regarding their aerobic fitness, percent fat and metabolic rate.
Remuneration is offered.