One must burn more calories than one takes in to lose weight at any age. This can be done either with caloric restriction or with exercise. Although metabolism slows down somewhat as we age, increasing weight with age is usually due to a drop-off in activity while dietary habits stay the same or get worse.
Duthie EH. History and physical examination. In: Duthie EH, Katz PR, Malone ML, eds. Practice of Geriatrics. 4th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 1.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.