Shock, Nathan W.Greulich, Richard C.Costa, Paul T, Jr.Andres, ReubinLakatta, Edward G.Arenberg, DavidTobin, Jordan D.Normal Human Aging is an overview of the first 23 years of research findings about the natural course of human aging. The Baltimore Longitudinal Study of Aging was started in 1958 to "trace the effects of aging in humans." The BLSA recruited men aged 17 to 96 and women beginning in 1978 to participate in repeated assessments of health and physical and psychological performance. Visits were every two years over 2 1/2 days.NIH (National Institutes of Health)HealthstudiesagingresearchOther