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  1. longevity86

    long-term CR vs. continual weight loss?

    That is a great paper (which I read the other day). For the population at large, I agree that obese/overweight should get down to (for example) a more typical weight of a few generations ago. But that's just a starting point. For niche communities (CR, paleo/primal, longevity 'body hackers'), *many* questions remain. e.g. 20% BMI (from the abstract) doesn't strike me as corresponding to CR (at least for males). Or, to cite another number: "In most of these omitted studies, the BMI range associated with the lowest mortality was around 22.5–25". Surely that's not a typical range for CR?!? Is Barak's 17.5 BMI probably healthier than 20? I'm pretty sure 'conventional medicine' would disagree. But, it wouldn't be the first time they were wrong!
  2. longevity86

    long-term CR vs. continual weight loss?

    Thanks for the reply; interesting! > And although weight is again stable continuing at that intake level would still be considered 20% CR. Hmm... That seems to shift the discussion from restricting calories to something like: 1. the previous conventional wisdom was that the ideal weight or body composition was 'x' (pick your favorite metric: % body fat, waist-to-height ratio, BMI for all its faults, etc.) 2. the 'CR' community thinks the ideal is __% less than that If one is constantly restricting calories to the point of hunger (which I gather is true in at least some of the animal studies), is that really weight stable? Seems unlikely -- though metabolism, hunger etc. have lots of aspects which aren't intuitive! > My goal is to achieve and sustain a body fat of 10% - 12% and increase lean body mass. My goal (and part of the reason I stopped by here) is to figure out what % body fat is most likely* to promote longevity ... and then to increase lean body mass around that. * granted, we don't know ... but each of us has to make a choice, so might as well sift from the best available evidence rather than rely on conventional 'wisdom' which seems to have gotten more wrong than right since the 1970s. I look forward to other views!
  3. I assume this has been covered on the forums, but I haven't been able to find it. (And, I confess to not having read any of the CR books....) Granting that metabolism & nutrition are very complicated, it still seems like: - at steady state, adequate calories = no weight gain or loss and therefore: - calorie restriction = weight loss Let's ignore the question of whether a little extra weight is protective when one is 'old', and focus on age 25-50 or some such. When a long-term CR practitioner doesn't want to lose more weight, must CR (and the potential benefits thereof) stop? If not, what am I missing? Thanks!