sthira, on 02 March 2011 - 02:51 PM, said:
But I don't think CR is about being skinny, even if "tall". I think it's about reducing calorie intake, even if tall.
Thanks to you , Shira and all here for your comments on this subject I have thought a lot about. Sorry, I haven't been able to answer your insightful replies before now.
First I would agree that CR is not about being slim. It is about lowering calories and perhaps just as important, cell signaling -- getting the body to shift its metabolism from growth and energy usage to cell maintenance and energy production. For those following the CR Way, we recommend keeping BMI at a minimum of 18.5, as was suggested in one thoughtful reply in this dialogue. I have discussed this many times with Dr, Fontana and he has clearly warned that as weight drops lower and lower, bone density becomes a significant risk factor.
Its far better to maintain a reasonable BMI ( like my Uncle Pat whom I featured in the start of this subject) and defend it by eating more calories when weight drops too low. Every successful centenarian I have observed has a BMI along these guidelines. The key is their thriftiness -- the fact that they are able to maintain their weight with few calories. My friend Ralph, who made it to 104, had a BMI of 22+ but he maintained it with a tiny amount of calories.
He was 5' 10". I'll bet if he was several inches shorter, he would have become a supercentenarian. That was his goal.
I do not wish to demoralize tall folk about their chances for longevity. The purpose of the blog and post here was to expose the risk factors so we can work together to minimize them.
Edited by pmcglothin, 26 March 2011 - 06:15 PM.