Most aging individuals die from atherosclerosis, cancer, or dementia; but in the oldest old, loss of muscle strength resulting in frailty is the limiting factor for an individual's chances of living an independent life until death. Three hormonal systems show decreasing circulating hormone concentrations during normal aging: (i) estrogen (in menopause) and testosterone (in andropause), (ii) dehydroepiandrosterone and its sulphate (in adrenopause), and (iii) the growth hormone/IGF1 axis (in somatopause). Physical changes during a...
Horstman AM, Dillon EL, Urban RJ, Sheffield-Moore M. J Gerontol A Biol Sci Med Sci. 2012 Nov;67(11):1140-52. doi: 10.1093/gerona/gls068. Epub 2012 Mar 26. Review.