Underweight, overweight or healthy? Don't rely on BMI - Lifestyle - Video - 3 News
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Underweight, overweight or healthy? Don't rely on BMI - Video

Mon, 27 Apr 2009 19:27
We are constantly being urged to keep healthy, and one of the quickest ways of calculating how healthy you are is your BMI - your body mass index. But over the years the BMI has come in for some criticism for not telling the whole story. - read full story »

Comments [3]

jonathan, auckland
29 Apr 2009 12:48a.m.

Just like a kilo of eggs weighs the same as a kilo of fat! let me put it a more simple way.If you had a 10 litre bucket of fat and a 10 litre bucket of muscle tissue.It would weigh 3 times more than the fat bucket would!DENSITY.
It is possible to loose weight but actually put on fat.If you dont use your muscles they will atrophy and shrink causing you to loose weight.I have seen people who have lost 10-15 kilos.The weight they have lost has been a combination of muscle loss,water and some fat.They look skin and bone!The idea is to conserve muscle mass via resistance training.The r/t encourages your body to burn fat as does fasting.If people have a muscular frame they are more lightly to weigh a lot more, hence 6 foot rugby backs weigh 75-100 kg on average,whereas
big muscular forwards weigh 100 to 120 kg or more and tend to be 5-11 to 6 foot six.Ali williams is an example of a big dood but not heavy with muscle.
The downside of all that muscle,is they are weighed down and are often called "Fatties".Ask a doctor if you do not believe me.Lomu actually became to big with muscle,more like a no8 and lost his speed as a result.Look at him in his younger days.Far lighter,built for speed.Lean and mean.I know,i was a prop! Body builders are the perfect example.I know one guy who is 5 foot 9 and weighs 105kg and 7%body fat.He is ripped.He would be obese under the bmi.cheers

Tamasin
28 Apr 2009 10:05a.m.

Muscle does not 'weigh' more than fat. 1 kilo of fat weighs the same as 1 kilo of muscle.
Muscle is simply denser therefore if two people weighed the same but one had more muscle mass, this person would take up less space.

jonathan, auckland
28 Apr 2009 12:47a.m.

your bmi does not take into account your lean body mass or fat mass.Muscle weighs 3 times as much as fat.Hence tony woodcock is obese.If you measured his body fat % you would find it was very good.Fat is non alive tissue,it does nothing except store toxins.Muscle is bilogically active burning calories all the time.Its your body fat percentage that counts.My friend is 6 foot 3 and well built.He is obese according to BMI.I have scales that measure your body fat percentage or you can use calipers via a personal trainer to measure your fat under the skin folds.Forget the BMI.

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