This has nothing to do with fiber, since I reckon that's been covered pretty well already.
Rather, it's in response to a comment included in a pp's fiber response.
I got interested in the "older people need less calories" thing some time back, because I'm over 50. I reckon I could say I'm closer to 60 but who wants to admit THAT?
Anyway, all this info is *in general*; it does not speak to any one person's particular circumstances. According to the Mayo Clinic, in general, older people are less active (this makes sense; the kids are grown & gone, less activity keeping up with them, less housework with no kids, perhaps some arthritis or another condition associated with aging that makes activity more challenging, etc). As part of the aging process, your basal metabolic rate drops over time, heart rate becomes slower, muscle mass decreases and body fat takes its place.
According to research at Tufts, from about 45, you lose 1% per year of muscle mass. By 50, you're losing 1 - 2% per year, and by 70 a person has 20% less than they had at age 36.
If a person's BMR (and age is part of the BMR equation) is lower, they're less active in general, and they're losing muscle mass-- well it makes sense that they'd need less calories per day. Muscles are what burn the calories; if you have less, you'll burn less.
I was aghast when I read this stuff. Sure, I knew about bone density loss, and skin losing its elasticity etc. I don't know why it never occured to me that there'd be these other changes too. sigh. All the more reason to be sure to be including strength training, as well as cardio.
Edited by: MISSRUTH at: 3/17/2013 (10:01)
Ruth in Cookeville, TN Central Time Zone
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