Individuals with Prader-Willi syndrome have hyperphagia, a characteristic eating disorder defined by a marked delay in the satiety response when compared to controls. This eating disorder has been particularly difficult to control. The authors taught and evaluated effectiveness of regular exercise alone, regular exercise plus healthy eating, and mindfulness-based strategies combined with exercise and healthy eating to an adolescent with this syndrome. Mindfulness-based strategies included mindful eating, visualizing and labeling hunger, and rapidly shifting attention away from hunger by engaging in "Meditation on the Soles of the Feet". On average, when compared to baseline levels, there were decreases in weight with regular exercise and exercise plus healthy eating, but the most consistent and sustained changes were evidenced when mindfulness training was added to exercise and healthy eating. The adolescent continued using the mindfulness health wellness program and further reduced his weight during the 3-year follow-up period. (Contains 3 figures.)