were required to extract him. In another incident (this time in New Orleans), Humphrey attended a movie and became stuck in the theater seat. Welders had to cut the seats around him in order to get him out. Towards the end of his regular career, he recognized his problem and had an operation to remove of fat from his body; however, he gained the weight back soon afterwards. Doctor-regulated lifestyle In 1962, Humphrey was forced into early retirement due to a heart condition. After retiring, his weight ballooned to over . At this weight he would tire after about 10 steps and have to sit down (in two chairs). Humphrey attempted to control his eating habits (which sometimes included eating up to 15 whole chickens in one sitting), but after consulting with doctors, he decided to volunteer for obesity research and checked himself into the Medical College of Georgia's Clinical Investigation Unit in Augusta. Upon entering the clinic, he weighed . For two years, Humphrey followed a strict doctor-controlled diet regimen. He was not allowed to exercise (in order to avoid fluid loss via sweat) and was confined to the air-conditioned clinic itself. The regimen included strictly measured amounts of food and water, with about 1,000 calories total per day and a rotation in 56-day cycles. The first cycle consisted of high-protein foods, including eggs, skim milk, ground beef, margarine with toast, tomato soup, ketchup, green peas, and applesauce. The next cycle was high-carbohydrate, including toast, corn, lima beans, shortbread, peaches, applesauce, pineapple, puffed rice, skim milk, grape juice, orange juice, and small amounts of sugar. The third cycle was a high-fat diet: salt-free mayonnaise and butter, tomatoes, eggs, whipped cream, and cream cheese. Massive weight loss and obesity study In the spring of 1965, Humphrey left the clinic where he had lived the previous two years. He weighed a comparatively healthy , a total loss of since he was admitted. Humphrey won a place in the Guinness Book of World Records as "champion slimmer" for this weight loss. According to the two-year study headed up by Unit Director Dr. Wayne Greenberg, Humphrey's weight loss on each of the three diets was approximately the same; however, the nature of the actual body matter lost during each differed significantly. The vast majority of the weight lost on the high-protein diet was body fat and Humphrey's hunger was satisfied for longer periods