General / Off-Topic Cedars-Sinai updates an equation

Robin of Spiritwood

Robin of Spiritwood
https://newatlas.com/body-fat-index-rfm-bmi/56096/

Basically they reset how to estimate bodyfat from just height and waist measurements. Although they specify to use metres, height/waist calculation eliminates the units.

So feel free to use, say, inches. It'll still work.

Here are the formulae:


  • MEN: 64 – (20 x height/waist circumference in meters) = RFM
  • WOMEN: 76 – (20 x height/waist circumference in meters) = RFM
This yields a percentage number. The amount of your body that's fat mass.

So if you do the calculation and get say, 21, multiply your bodyweight by .21 to get the estimated fat mass.
 

Bob Lighthouse

Banned
Bob Lighthouse
Robin of Spiritwood said:
https://newatlas.com/body-fat-index-rfm-bmi/56096/

Basically they reset how to estimate bodyfat from just height and waist measurements. Although they specify to use metres, height/waist calculation eliminates the units.

So feel free to use, say, inches. It'll still work.

Here are the formulae:


  • MEN: 64 – (20 x height/waist circumference in meters) = RFM
  • WOMEN: 76 – (20 x height/waist circumference in meters) = RFM
This yields a percentage number. The amount of your body that's fat mass.

So if you do the calculation and get say, 21, multiply your bodyweight by .21 to get the estimated fat mass.
Click to expand...


I keep thinking about this, and how well it accounts for racial variations.
I'm curious to see how it applies to squatty, wide and long living Asians.
Okinanwans, well known for their longevity, are short and wide even by Asian standards.
They are by average, the shortest of the Japanese prefectures.
 

Chris Simon

Chris Simon
Bob Lighthouse said:
I keep thinking about this, and how well it accounts for racial variations.
I'm curious to see how it applies to squatty, wide and long living Asians.
Okinanwans, well known for their longevity, are short and wide even by Asian standards.
They are by average, the shortest of the Japanese prefectures.
Click to expand...

Eat only seafood and veggies, live in a nice enough place and even if you are fat, you will live longer. Your bones will suffer and joints will stop working eventually, but you will live. :)
 

Bob Lighthouse

Banned
Bob Lighthouse
Chris Simon said:
Eat only seafood and veggies, live in a nice enough place and even if you are fat, you will live longer. Your bones will suffer and joints will stop working eventually, but you will live. :)
Click to expand...

My point is: Just using height and weight might give an inaccurate indication of body fat percentages in naturally short/wide populations.

I would expect some Okinawans(eg) with "bad" numbers to have perfectly fine body fat percentages, using that scale in the OP.
 

Chris Simon

Chris Simon
Bob Lighthouse said:
My point is: Just using height and weight might give an inaccurate indication of body fat percentages in naturally short/wide populations.

I would expect some Okinawans(eg) with "bad" numbers to have perfectly fine body fat percentages, using that scale in the OP.
Click to expand...

Well, yeah. I don't think this index is aspiring on being precise. I think it's something everyone can use to get the general idea. And if they want to know how much actual fat they have, they will have to visit the doctor to have it measured, anyway.
 

Slange Lands

Slange Lands
I am thinking that the advertisement of fast food may eventually be heavily controlled, mainly for venues frequented by children. The obesity epidemic in the US and UK is frightening.
 

Slange Lands

Slange Lands
Chris Simon said:
Both are pretty bad, imho. Equally bad, I'd say. But while immobility is bad mostly just for you, senility is bad for everyone around you, so... not if I can help it
Click to expand...

Agreed. I used that motto in the past to encourage myself to exercise on a regular basis. The thought of being too fragile to take care of myself or too impaired to play video games was unacceptable. That has changed. Now the choice is exercise or feel like crap. At age 53, if I do not exercise my body starts feeling arthritic.
 

Chris Simon

Chris Simon
Slange Lands said:
Agreed. I used that motto in the past to encourage myself to exercise on a regular basis. The thought of being too fragile to take care of myself or too impaired to play video games was unacceptable. That has changed. Now the choice is exercise or feel like crap. At age 53, if I do not exercise my body starts feeling arthritic.
Click to expand...

Oh, yeah. One feels like a vampire, who simply spent the day dead and now has to convince his body to move again, one part at a time. :D
 

Bob Lighthouse

Banned
Bob Lighthouse
Chris Simon said:
Well, yeah. I don't think this index is aspiring on being precise. I think it's something everyone can use to get the general idea. And if they want to know how much actual fat they have, they will have to visit the doctor to have it measured, anyway.
Click to expand...

That's exactly what they are suggesting.

"The relative fat mass formula has now been validated in a large data base," says Richard Bergman, PhD, the senior author of the study and director of the Cedars-Sinai Sports Spectacular Diabetes and Obesity Wellness and Research Center. "It is a new index for measuring body fatness that can be easily accessible to health practitioners trying to treat overweight patients who often face serious health consequences like diabetes, high blood pressure and heart disease."
Click to expand...

The question I have is was that database wide enough, ethnically speaking
 
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