At the first method to account the ideal weight it used length, chest measurement and gender.
This method (other denomination Quetelet-index) gives indication or your weight at your body length is appropriate.Your weight is shared your length in the square. It is well if the outcome lies between 18.5 and 25. Below are you too thin in proportion with your body length. You calculated index is something more than 25 then are you possible something too heavy. Much above 25 are you unhealthy fat. For people above the 60 years the BMI is not the correct method.
|Body Mass Index|
|Under 18.5||Too skinny|
|Between 18.5 and 25||Good. Healthy weight|
|Slightly over 25||Probably overweight|
|Much over 25||Too heavy|
|Above 32||Heavily overweight|
If you have not enough time or no sense (or whatever) you can measure only your body length. This third method is less reliable.
Measure with a measuring-line your abdomen scope. For this you must take the waist outline between the bottom rib the upper part of the hip. You cannot attract the measuring-line too tightly.
|Between 80 and 88 cm||Increased risk|
|Above 88cm||Highly increased risk|
|Between 94 and 102 cm||Increased risk|
|Above 102 cm||Highly increased risk|
For people over 50, this method is probably a more appropriate method than the Body Mass Index. Overall, the percentage of fat and muscle mass during aging. This means that the body weight at the Body Mass Index calculation reduced pro rata, because muscle is heavier than fat.