B.M.I just a LIE?

Question

correct me if i am wrong but on a bmi calculater you state you weight,height and age right? but although the height and weight is perfect but what about the weight how can this calculation ''know''
diference between muscle and fat weight


some of you might not understand what the hell i am talkin bout right?

4 example

if i am super mascular the bmi calculation will calculate the muscle weight as fat weight wont it?

another example is...

A and B have the same height right?A is fat and B is full of muscle but their weight is the same cos muscle is heavier than fat but their BMI would be the same!!!!!!!!!!!!!!

this might be true but if you can point out my mistake please do
THX!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

I don't trust the BMI scale. It goes according to your weight and height. You can be physically fit and have a lot of muscle weight which could make you seem overweight if you compare your weight against the BMI scale. The best way to test your body fat is Hydrostatic Weighing, Bio-Electrical Impedance Analysis (BIA), & Caliper Pinch Test. Here's the link below.

Answer 2

You are right, BMI isn't an indicator of how good you look. It's a generalization of how much you should weight to be healthy for your height. Carrying around a lot more extra muscle than your body was genetically intended to can lead to higher risks of heart disease just like people carrying around extra fat. It’s not as bad though but even if the person eats healthy just because the body is larger it is harder for the heart to support it. People that are real bulky with muscle tend to not to do too much cadio type exercises, because cardio exercise will reduce muscle mass. Ever seen a large muscular distance runner or cyclist? I think not. Get one of those fat percentage calculators if you really want to know how your exercise program is going, or become competitive in lifting, running, swimming, or anything that you can track your improvement over time. My BMI has me at slightly overweight sometimes when I am lifting a lot and not doing much else, even though my fat percentage is still around 10% - 12% If I am doing a lot of cardio my weight drops quickly, I go vary from 140 – 190, I think 160 is my normal weight and I think both 140 and 190 are unhealthy weights.

Answer 3

BMI is useful for an average, typical person that does not exercise. It is useless for anyone with an athletic build and more than average muscles. Even the CDC says this on their web site:

"It is important to remember, however, that BMI is not a direct measure of body fatness and that BMI is calculated from an individual’s weight which includes both muscle and fat. As a result, some individuals may have a high BMI but not have a high percentage of body fat. For example, highly trained athletes may have a high BMI because of increased muscularity rather than increased body fatness. Although some people with a BMI in the overweight range (from 25.0 to 29.9) may not have excess body fatness, most people with a BMI in the obese range (equal to or greater than 30) will have increased levels of body fatness."

Answer 4

Well let's put it this way, BMI has my husband as overweight, but he has less than 10% body fat! Its not accurate for people with more muscle, only for people that don't work out, who are of average frame size. HTH : )

Answer 5

Its meant for the average person...A super muscular person isn't average.