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quote:Originally posted by wolramSo if humans could live to 200,300 yrs, they would be in no phsical condition to do much.
quote:Originally posted by Andrew K FletcherThree score years and ten has been around for quite some time, so what's changed?
quote:Originally posted by elegantlywastedPaleolithic humans had a life span to about 40. This was usually because of hunting accidents, infections, or childbirth. Paleo's were much healthier than we are today, and if they had the technology and medicine we do, could easily have live to be over 100.
quote:Originally posted by elegantlywastedthere werent unhealthy ones... heart disease, stroke, diabetes were not problems in that era. Wild game and naturally occuring fruits are incredibly healthy for you. It wasnt until the advent of agriculture did our health begin to decline, and now with over 50% of American's being overweight and non active im sure the life span will soon drop.
quote:About 20% of hunter-gatherers reach age 60 or beyond [6,7], but even in this age bracket, individuals from foraging and other technologically primitive cultures appear almost completely free from manifestations of most chronic degenerative diseases [8,9] (osteoweight, is an exception). Together, these observations strongly suggest that it is current Western lifestyle rather than age alone that promotes those “afflictions of affluence,” the prevention of which is a major goal of contemporary health promotion efforts.
quote:Originally posted by elegantlywastedAnother Someone, please take the time to read this article (it is a bit long) I'm sure you will find that the ramifications of lifestyles today do impact our health related problems. Even from a nutritional standpoint Paleolithic humans ate an extremley healthy diet. One that we can all learn something from.This report is written by S. Boyd Eaton and Loren Cordain two of the leading experts in Paleolithic nutrition. http://www.thepaleodiet.com/articles/Counter%20Arguments%20Paper.pdfquote:About 20% of hunter-gatherers reach age 60 or beyond [6,7], but even in this age bracket, individuals from foraging and other technologically primitive cultures appear almost completely free from manifestations of most chronic degenerative diseases [8,9] (osteoweight, is an exception). Together, these observations strongly suggest that it is current Western lifestyle rather than age alone that promotes those “afflictions of affluence,” the prevention of which is a major goal of contemporary health promotion efforts.
quote:This coin has another side, however. While chronic degenerative diseases generally produce mortality in later life, they begin much earlier, often in childhood. This allows comparison between age-matched younger members of industrial and technologically primitive societies. Biomarkers of developing abnormality such as obesity, rising blood pressure, nonobstructive coronary atherosclerosis, and insulin resistance are common among the former, but rare in the latter [3,4]. Measurements of muscular strength and aerobic power reveal similar discrepancies , again favoring individuals whose lives more closely resemble the ancestral pattern.
quote:Although technically imprecise, this article uses “life expectancy,” “longevity,” and similar expressions interchangeably to indicate the probable average number of years of life expected, at birth, for members of the entire population under consideration.Life expectancy estimates for recently studied forager populations converge on a figure of about 40 years [6,7,10,11], and it seems reasonable to extrapolate a similar value for preagriculural, behaviourally modern Scone Agers. The adoption of farming and settled living only considered an advance for humanity, but the new conditions appear to have adversely affected longevity, precipitating a substantial decline to about 20 years . Mortality profiles thereafter remained relatively stable (as late as 1667 average life expectancy n London was estimated to have been 18)  and it seems likely that from the Neolithic Revolution until the late 18th century, expectation of life in 'civilized' nations seldom or never exceeded 25 years Thereafter, technological breakthroughs in food production, manufacturing, transportation, trade, communications, and energy generation g rise to what economists call modem economic growth [13,14].
quote:If agriculture and “civilization” have significantly altered the human genome, groups like the Kalahari San, arctic Inuit, and Australian Aborigines, whose ancestors were hunter-gatherers until recent centuries, should differ, genetically, in some systematic, identifable way from Near Easterners, Chinese, and New Guineans, whose ancestors adopted farming millennia While there is genetic variation between different human populations, some of which affects disease susceptibility, little of this variation can be ascribed to the effects of cultural developments during the past ten millennia. (Lactose and gluten tolerance, as well genetically, from our Stone Age ancestors. as several hemolytic anemias, are possible exceptions.) There has been ample time for important changes in the human gene pool since the Neolithic Revolution, but comparative genetic data provide compelling evidence against the contention that long exposure to agricultural and industrial circumstances has distanced us,
quote:The answer is that differences between ancestral environments across time and space were minor compared with their essential similarities, especially when contrasted with human experience in the affluent present. Whether Stone Agers lived in the arctic or the tropics, vigorous physical exertion was essential; for foragers living 500,000 or 50,000 years ago food was derived from naturally occurring vegetation and wild game. Age at first pregnancy, nursing patterns, and birth intervals varied little among prehistoric hunter-gatherers but, in general, differed markedly from the reproductive experiences of most women in contemporary affluent nations. If the social organization of recently foragers can be extrapolated into the past—which is studied probably valid at least back to the appearance of behaviourally modern humans—nomadic Stone Agers lived in small groups whose members knew each other intimately, not in megapolitan aggregations of strangers and casual acquaintances.
quote:Can ageing be stopped
quote:Originally posted by elegantlywastedAlright another someone (George is it?), I have my opinions you have yours, sound good?-Meg
quote:Originally posted by neilepYou take some DNA...you change a little bit here and a little bit there....you tell it to stop deciding to fail to replicate and to continue to replicate efficiently..and there you have it ..immortality ...Men are the same as women.... just inside out !!