Body Mass Index

Death

Yup, it's bollocks: body fat percentage is a more meaningful measure.Â Needs some skill to get it right (calipers etc).Â Athletes will have 6-13% body mass made up of fat, fit to fat bastard 'normal' people will range 14 - 25%, and over 25% is 'obese'.Â 15% is a good target.

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Carl Hayman - 193cm, 120kg, BMI = 32.2 = OBESE!!!!!!! 
Phil Waugh - 175cm, 100kg, BMI = 32.7 = OBESE!!!!!! 
Tatafu Polota-Nau - 181cm, 113kg = 34.5 = OBESE!!!!!! 
 
And on it goes. Locks and backs are mostly 25-30, and front row and back row mostly 30+ except for the really tall guys.

mark_s

I had a doctor pull the BMI shit on me once when I went to see him for a work medical certificate for having a flu. 
 
I would need to be under 110kg to not be obese, I havenâ€™t been that weight since my uni days where it was normal to spend atleast 2 hours or so exercising each day.Â Never gunna happen again I am afraid, unless cut off a leg or something.

dogmeat

I changed jobs a couple of yrs ago and realised I had no life insurance all of a sudden.Â Insurance co. tried to load my insurance premium 100% because my BMI was 34 (well OK and the liver function and cholesterol results but still)

Miller V Jackson

At 25.5, MvJ is on the cusp of normalityÂ <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/blink.png' class='bbc_emoticon' alt=':)' /> This must be incorrect...

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Lack of muscle mass MvJ - most people store some weight as fluid too, whereas you're storing it as alcohol <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/smile.png' class='bbc_emoticon' alt=':)' />

ACT Crusader

[quote name='Nick the Aussie'] 
[quote name='"Red Bull":3grdfv65'] 
For some reason I thought you were taller than that Nick? Were you standing on a box in your wedding photos? You looked about 6'3 in those pics I reckon.[/quote] 
 
Yeah thanks <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/smile.png' class='bbc_emoticon' alt=':)' /> Mrs the Aussie isn't the tallest girl in the worldÂ but I likes em small I does :twisted: 
 
The electric pulses for body fat are no real indicator. They can be wildly inaccurate depending on how much you sweat, how hyrdated you are, and whether you're standing on the precise points for them. Body pinch is the only way. 
[/quote:3grdfv65] 
 
What about that thing they do on biggest loser, when you get in a huge tub and float while you're hooked up to some wires. Someone explain that in lamens terms for me???

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:-k No fucking idea mate. Something about the density of fat and muscle - muscle is about three times heavier for the same volume.

ACT Crusader

Nicko after a bit of research its called - Hydrostatic Weighing to Measure Body Fat 
 
 
[quote]Hydrostatic weighing (underwater weighing) is the [b]most accurate way to calculate body fat [/b] - that is, if you can find a hydrostatic weighing tank. 
 
How does hydrostatic weighing calculate body fat? By using Archimedes Principle. Your examiner first calculates your body density by measuring the amount of water you displace when you immerse yourself in water. Then a formula is used to calculate body fat based on your body density. The problem is finding a facility (University, major gym or fitness center) which has a hydrostatic weighing tank[/quote]

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Problem is the formula can be flawed if e.g. you have lots of muscle and displace much water but don't have that much fat. :nta

dogmeat

Yeah, water displacement wouldn't tell you %'s fat, muscle, bone, Banrock Stn.Â Must be more to it than that

Death

[quote]Problem is the formula can be flawed if e.g. you have lots of muscle and displace much water but don't have that much fat[/quote] 
 
Hmm: not heard of it before, but that doesn't sound quite right Nick: if it's done properly, they should be getting two measurements from such an action: 
 
a) The body volume - from displaced water. 
 
<img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/cool.png' class='bbc_emoticon' alt=':)' /> Your known weight - set of scales 
 
Knowing muscle, bone and fat densities, it's then just (!) solving a simultaneous equation to get the answer.Â I can see room for a few errors, but would agree that - in theory - it should be bloody accurate, if someone knows what they're doing.

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Agreed Death - there shouldn't be a lot of room for error for most people but for seriously fat people they could be waaay off. "The Biggest Loser" show features women as high as 170kg and men as heavy as 195kg without being that tall. 
 
Also complicating this is that even obese people who can still move under their own power tend to have a fair bit of muscle, because otherwise they wouldn't be able to move at all. The muscle might be marbled like prime beef but its still there. The ultimate problem is, as with BMI, they're going off assumptions of what the [i]average[/i] humans surveyed come out at, and don't necessarily take into account the skeletal structure of a person, which under all that fat is bloody hard to measure even though the density remains the same.

mark_s

A quick update, apparently BMI has been adopted by all insurance companies because the reinsurers have adopted it. 
 
Anyway I am still discussing my case with and they are starting to look at other measures and are considering giving me a separate medical.Â No guarantees yet though and they are reserving the right to fall back on the BMI as grounds for rejecting me.

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Go in there and challenge any of their execs to a live scrummaging session. That'll see how fit the bastards are <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/smile.png' class='bbc_emoticon' alt=':)' />

mark_s

The agent would love this idea, he is South African ad we end up talking rugby for 3/4 of the time when he calls me.

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Yeah BMI is a load of crap, the bad thing is some insurance companies use it so 'obese' people like us have to pay higer premiums

Kirwan

Bring in the stats for All Blacks and ask them to explain why they are considered obese.

BartMan

here a link for some cool things 
 
[url="http://www.bmi-calculator.net/"]http://www.bmi-calculator.net/[/url] 
 
I would burnÂ 2137.68 calories if I lay in bed all day doing nothing. 
 
I am also in the obese range.Â 31.something. 
 
Reckon I have a bodyfat percentage of 16.3.Â based on my weight and waist measurement.Â That mewasurement is not in the obese category, but in the fitness category.

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33.77 (Obese class 1) even with my recent weight loss <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/smile.png' class='bbc_emoticon' alt=':)' /> At my absolute peak a couple of years back I was nearly 39 <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/blink.png' class='bbc_emoticon' alt=':)' /> 
 
If WHEN I get to my goal weight I'll be 29.83, just short of obese, and probably fitter and stronger than every bastard who designed the BMI <img src='http://www.daimenhutchison.com/invision/public/style_emoticons/<#EMO_DIR#>/laugh.png' class='bbc_emoticon' alt=':)' />

The Silver Fern

Body Mass Index