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I think there's something to be said for toll taken by the the mental stress in addition to the physical stress that an individual might also go through if they're trying to maintain a lower weight that their body just doesn't seem to want to be at. e.g. If someone in Amanda's position was trying to get to that BMI of 22. We all know that Amanda eats very healthily and exercises quite a bit. Trying to cut enough calories and increase exercise to lose a lot more weight would be very stressful, and I doubt that would be very good for her either. Originally Posted by Circebee
One factor that may be involved in the higher mortality rate of lower BMI individuals is that some of these people are putting their bodies through tremendous stress to remain there if the natural , healthy, genetic "set point" of their body was intended to be a bit higher. This stress may take an effect on the body in the form of a lowered immune system. Even if it is through a good diet (at a low caloric level), and intense exercise, this can take it's toll over the long run.
Sorry to use you as an example Amanda. I go through the same thing - even when I'm at the top of my goal weight (not that I'm exactly there right now ) I still weigh more than someone of my height "should" weigh. I have to remind myself constantly that if I did weigh 125 pounds, I would literally be eating next to nothing, most likely have to let myself drop a lot of my muscle, and it just wouldn't be sustainable. I'd rather be on the high end of "normal" weight and be able to stay at one weight than yo-yoing all over - much better for my sanity, frankly.
Also, I wholeheartedly agree with what's already been said about how BMI doesn't take muscle mass or body structure into account, etc.