How accurate is the BMI for a bodybuilder

BMI alternatives: This is how you get the right values ​​out

What makes the most sense?

Who of you still catches yourself with the now and then Calculate BMI? It couldn't be easier to get a "scientific" statement about your own weight and health risk. But why you shouldn't do that anymore, how the values ​​lead you astray and what you are for BMI alternatives you can find out here!

What is the BMI again?

The BMI, body mass index, is extremely easy to determine your own weight class, i.e. whether you are underweight, normal weight or overweight. In addition, you can then roughly determine whether you might have health problems or not.
The formula for this: BMI = body weight in kg / (height in m) ^ 2. But there are also some BMI calculators on the net that can calculate your BMI. All you have to do is enter your weight and height. If you have the value, then you can have a look here:

What disadvantages does the BMI have for you?

The BMI has a huge disadvantage that can also be really dangerous for you athletes. Only height and weight are related to each other. Lean muscle mass, fat mass, fat distribution, bone weight and physique are ignored, although you can precisely determine your health risk through these values.

The disadvantages at a glance:

The BMI does not differentiate between muscles and fat

BMI is all about height versus weight. Whether your weight is due to a lot of fat mass or a lot of muscle mass does not matter with the BMI. That means that there is no precise information as to whether you are really overweight or not. It will Athletes labeled as overweightwho are well trained and "Wobbly" people as normal weight classified, although the fat mass is far too high in those. This inaccuracy can be so negative for some of you that health insurance companies increase your contributions because you allegedly have a health risk just because the BMI says so. You are in top health, have a low body fat percentage and your muscles are well trained.

The BMI does not take account of fat distribution

That this Belly fat most harmful is, you all know by now. Belly fat is a risk for cardiovascular diseases and fatty organs. But that is not included in the BMI. This means that if you are really slim on your stomach, but have a little more on your thighs or buttocks, then you are just as overweight and have a health risk as someone who wears a lifebuoy on the stomach but is otherwise slim. The health risk is different, because the less belly fat, the healthier you are usually.

The BMI ignores bone weight

"I have heavy bones!" This is no shit. You can't justify 5 kilos more, but not everyone has a skeleton of the same weight. The BMI does not take this into account either. That is, someone who has heavier bones but less fat may be classified as overweight and someone who has light bones and more fat mass is of normal weight and poses no health risk.

The BMI does not know any physique

In the BMI calculation, your physique is also completely ignored. This can result in your being as tall athletes obese according to the BMI Because of the size and the heavy muscle mass and small ones are of normal weight, although they are one or two kilos too much ... There is no distinction between tribes either, but the BMI, which means normal weight for Europeans, can already belong to the overweight group for Asians .

Although there is since 2013 an improved formula for the BMI, but it is not yet as well known as the old one and not official, so that health insurance companies, for example, still use the old formula.
The new formula is: New BMI = (body weight in kg x 1.3) / (height in cm) ^ 2.5
This new Body Mass Index is a little more precise than the old one, as people of all ages are no longer out of the ordinary. But the BMI still does not take into account the above points, which also makes it inaccurate.

What better BMI alternatives are there?

Waist-to-Height-Ratio (WtHR) = Waist-to-Height-Ratio (TGV)

The higher the result of the WtHR the higher the risk of developing cardiovascular disease. And the higher the value, the less athletic you are and the more you weigh. For example, the severely obese value would be 0.69. Supposedly this is the most accurate formulaas it takes into account fat distribution and physique.

WtHR = waist circumference in cm / height in cm

By the way, this is how you measure correctly:

  • Without clothes
  • In the morning before breakfast, on an empty stomach
  • Just above the navel, at the thickest part of the abdomen
  • Relax abdominal muscles !!!
  • Exhale completely, but do not pull in or tense your stomach
  • Round up to full centimeters

Waist-to-Hip Ratio (THV)

This formula des THV does not take any weight into account. This is all about your hips and waist. That is, the poor abdominal fat distribution is measured. Be sure to follow the measuring tips above. The more fat you have on your stomach, the worse your values ​​will be. These BMI alternative is more accurate when it comes to nasty belly fat.

THV = waist circumference in cm / hip circumference in cm

Ideal for men:> or = 1.0
Ideal for women:> or = 0.85

waist size

Even just that waist size can tell you more about your weight and your health risk than the BMI. For this you measure as described above.

Ideal for men: not more than 102 cm, from 94 cm slightly increased health risk
Ideal for women: not over 88 cm, from 80 cm slightly increased health risk

A Body Shape Index (ABSI)

The ABSI is calculated from the waist circumference, the height and the BMI. So it takes into account the important waist circumference for belly fat and height and weight. So there’s your physique as a formula. The ABSI is also reasonably accurate to get an impression of your physical condition.

ABSI = waist circumference in m / [BMI ^ 2/3 x (height in m) ^ 1/2]

If the value is above 0.083, then you are exposed to an increased health risk.

Which BMI alternatives are senseless?

Unfortunately, there are also a few formulas that are just as imprecise as the BMI. They also do not take into account the muscle mass, the fat percentage, the physique and Co.!

Broca formula

These too Broca formula does not take into account that healthy muscle mass is heavier than unhealthy fat. So everything under it is underweight and everything above is overweight.

Broca formula = height in cm - 100 = normal weight
Normal weight - 10% = ideal weight

Body Adiposity Index (BAI)

The Body Adiposity Index is just as imprecise as the BMI and when assessing your percentage of body fat, it is even worse than the BMI because it does not correctly reflect the body fat distribution. The hip circumference is not the waist circumference.

BAI = hip circumference in cm / (height in m) ^ 1.5 - 18 = percentage of body fat

Ponderal index = Rohrer index

The Ponderal index is very similar to BMI and ignores all body measurements except weight and height. That's why it doesn't really say anything about your health.

PI = body weight in kg / (height in m) ^ 3

Values ​​between 11 and 14 are normal weight. With the other formula, however, the PI is a little more precise for people of all ages.

BMI alternatives: the bottom line

The BMI is far too imprecise and says nothing about your real health risk and your physical condition. But not all of them either BMI alternatives are suitable for getting correct values. It is important that you definitely get yours Know your body fat percentage or measure your waist size. Because belly fat in particular causes you trouble and even the slim ones of you could have too much belly fat. Weight in relation to your height is not everything!
By the way, you can find out how to find out your real weight in "Weighing Correctly".

Have you already calculated your BMI and which one? BMI alternatives did you already know? Write it to me!

Your prince