Thursday, December 15, 2011

BMI, WHR, or WHtR

Since the advent of the use of Body Fat Measurement Index, Waist to Hip and Waist to Hight Ratio have been utilized;

from my reading BMI was only intended as a statistical tool in large numbers of people, not for specific diagnostic treatments; as well, it is not a very good indicator if the person is active physically as in athletics and weight training, as the muscle mass masquerades as body fat;
as well, these are the ranges of measurement results:

BMI Weight Status
Below 18.5 Underweight
18.5 -24.9 Normal
25 - 29.9 Overweight
30 & Above Obese

Waist to Hip is useful mostly in women, as their hip to waist displacement is usually greater than in men;

there fore I am sticking with the Waist to Height Ratio as the most sensible one;

however the ratio indicators that they list as being appropriate for individual age groups don't make a lot of sense, so I have decided to stick to a lower ratio number of .5 and a BMI of 25; if I reach an equilibrium between the two I will be happy; that means a waist measurement of between 34-36 and a weight of about 165-67, give or take a few lbs; this would place me at the upper limit for Normal weight on the BMI scale; we'll see how it looks when I get there;

My present height varies between 68 and 69, depending on how active I have been; mornings I am taller than evenings ;-) so I split the difference; 68.5 inches

I am hoping to become more active and exercise oriented over the winter, with the Mini-Gym, and therefore my Muscle Mass (MM) should increase; but of course this will require constant exercise, as stopping will only allow that muscle to return to fat ;(

at present my WHtR is thus;
Waist 40 inches
Height 68.5 inches
Ratio 0.584 or 58.4 %
Goal 0.5 or 50%

BMI uses this formula
BMI = (weight in pounds * 703 ) / (height in inches²)

that's why a BMI Calculator is useful ;-) Google BMI Calculator and there are MANY on line; This one on Fuse.net looks to be a good one: http://home.fuse.net/clymer/bmi/ as it covers all the popular ratio indicators;

For my own Calculations,

the BMI is this:
Weight 192 lbs x 703
Height 68.5 squared
or (192 lbs x 703) / (68.5 x 68.5)
Ratio 0.288 or 28.8 %
Goal 0.25 or 25 %

While it would appear that I have only a short way to go, realistically, I won't enter the safe zones (non obese), until I get down to 175 lbs and about 36 inches, which at the rate I have lost the last 20 lbs (September to December)about 3 1/2 months, with Christmas before me and a long winter indoors, means that at best I can expect to be there by March/April; about time for my first check up, and stress test, which is with the Cardiologist; my GP has me booked for June Physical at which I am hoping to be within range of my goals;

but as I indicated above, the goals are not written in stone; a lot depends on how healthy I feel and look; looking and feeling like a prison camp survivor is not my idea of being healthy and the Doctors will be less than impressed ;)

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