Re: Aging and waist size (was: New data on salt and BP)

[Guest guest]

Well, the equation works for me, but I suspect it's because I'm at a minimum intake for my age and weight.

I believe there are other factors, such as absorption. And I believe the body can excrete nutrients and I believe there is a mechanism to control how much. If you pen up cattle and provide plenty of feed they get fat even at a young age. They also excrete a lot of nutrients in that process. But if you let them roam and eat just grass, they don't grow as fast and they don't develop the "marbling" in the meat.

Meat is judged by yield grade, so if you get a low yield grade meat (3 eg), you'll get less meat and more fat. Back in 1970, we bought freezer beef and the yield grade had a significant effect on how much meat you got out of a 250# hindquarter.

Here's an extensive discussion of yield grades:

http://savell-j.tamu.edu/beefgrading.html

http://www.oznet.ksu.edu/ed_asi315/beefyg/sld004.htm

So the yield grade is determined by how the cattle are fed and the exercise they get - very similar to humans. Like cattle, a human can be 180# with a lot of muscle or 180# with a lot of fat. We could grade humans in yield grade 1 thru 5, maybe you would be 1, I might be 2 or 3, while a obese"looking" person might be a 5. We might refer to their bodyfat % also.

The same waste factors exist in fowl production - turkey litter is 17% protein, eg., and is recycled into cattle feed.

http://www.ces.ncsu.edu/depts/agcomm/writing/apwmc8.htm

http://www.ces.ncsu.edu/disaster/drought/dro-49.html

That part of the equation is never considered - I haven't seen the exact transfer function for intake and output - it's not just all to weight gain or energy.

It would be something like:

weight gain = (energy intake) * (absorption function) - (energy output) - (calories excreted)

Regards.

----- Original Message -----

From: citpeks

Sent: Thursday, March 24, 2005 8:07 PM

Subject: [ ] Aging and waist size (was: New data on salt and BP)

JW,Looking at the -Benedict eqution for enlightenment on thisissue, there are two factors to consider: 1) decreasing height withage, and 2) slower metabolism with age.Man: BEE = 66.47 + (13.75 X weight in kilos) + (5 X height in cm) - (6.76 X age in years)As we get older we need fewer calories, and as we shrink with age weneed fewer calories. If we keep eating like when we were young, a"gut" will develop. The age factor of the equation is -167 at age 25, but -338 at age 50.This means that by age 50 you should be eating 171 fewer calories perday than at age 25. If you don't change your eating habits, these 171extra calories per day add up to 62,415 calories per year which is anextra 17.8 lb of fat.Tony=====From: "jwwright" <jwwright@e...>Date: Thu Mar 24, 2005 6:43 pmSubject: Re: New data on salt and BP...The guts I have observed on manual workers is, for example, my lawnmower man for several years was trim and worked maybe 7 lawns per day.He had done that for some years before I hired him. In spite of the"exercise", I noticed one day he was sitting in his PU "cooling" offfrom the heat....Then he began to add a "gut",i.e., - his waist size increased, for noapparent reason. I had done that by 1994 without doing manual labor -working in an A/C office. So I have to wonder if we know what thismechanism is exactly?There are a lot of guys developing this waist size thing, while I havereduced mine to 37-39 inches. Hips 42"....I attribute that solely to cutting back on fats, which of course,lowered calorie intake as well. My calories intake is still 1800kcals. Only fat restriction and calorie restriction keep me in prettygood shape compared to others. That gut represents HTN, obesity, probably leading to other badthings. In fact, the only thin guys are a bank clerk and an insurancesalesman.Regards.

[Guest guest]

Amen. Your, "absorption function" is a significant factor as we see even slight differences in energy balance such as caused by aging

will accumulate over time.

I suspect that changing to a high(er) fiber diet alters our digestive systems ability to extract energy.

While this can be measured it's a bit too messy for me. While it would be nice to crunch some numbers on a spread sheet and

predict our future, I suspect the bathroom scale will be the bottom line regarding our bottom line.

JR

-----Original Message-----From: jwwright [mailto:jwwright@...]Sent: Friday, March 25, 2005 2:38 AM Subject: Re: [ ] Aging and waist size (was: New data on salt and BP)

weight gain = (energy intake) * (absorption function) - (energy output) - (calories excreted)

Regards.