Approximately one in five Americans are over the age of 65, and that number is quickly growing. As baby boomers reach retirement, many decide to make the move from a primary care physician to a geriatrician – primary care doctors who have special training in offering health care to seniors. The health care needs of people change as they age, and many begin to experience new medical conditions such as arthritis, diabetes, renal failure, or heart disease. Some inevitable signs of aging take place over time, such as a slower metabolism, and lead to a decline in physical activity. Some...