Body mass calculator for weightlifter?

Page 1 of 1 [ 4 posts ] 

Jamesy
Veteran
Veteran

User avatar

Joined: 24 Oct 2008
Age: 33
Gender: Male
Posts: 6,388
Location: Near London United Kingdom

27 Mar 2022, 7:53 am

Why isn't there a body mass index calculator for weightlifters since normal bmi doesn't apply to the portion of the population who workout a lot?

Basically a body mass calculator for individuals who weight lift would also include body fat percentage to determine if your a healthy weight for your height.



Ettina
Veteran
Veteran

User avatar

Joined: 13 Jan 2011
Age: 33
Gender: Female
Posts: 3,966

23 Apr 2022, 5:54 am

How would you determine what percentage of weight is muscle vs fat? Muscle mass won't weigh the same, or even proportionally the same, for every weightlifter.



s7518
Emu Egg
Emu Egg

Joined: 21 Apr 2022
Age: 51
Gender: Female
Posts: 3

24 Apr 2022, 12:10 pm

You are right, BMI will not be accurate for a weightlifter. It will overestimate body fat.
For body fat calculations, the skinfold method is probably the most common one used and would be more accurate than BMI for someone with a significant amount of muscle. You would have to find a personal trainer who is experienced in taking skinfold measurements and calculating body fat using this method.
A less common method for determining body fat composition is hydrostatic weighing. It is considered to be one of the most accurate methods, but it may be difficult to find a place that does it.
There are also smart scales out now that measure body fat, etc., but they are apparently not very accurate.



Jamesy
Veteran
Veteran

User avatar

Joined: 24 Oct 2008
Age: 33
Gender: Male
Posts: 6,388
Location: Near London United Kingdom

24 Apr 2022, 5:04 pm

s7518 wrote:
You are right, BMI will not be accurate for a weightlifter. It will overestimate body fat.
For body fat calculations, the skinfold method is probably the most common one used and would be more accurate than BMI for someone with a significant amount of muscle. You would have to find a personal trainer who is experienced in taking skinfold measurements and calculating body fat using this method.
A less common method for determining body fat composition is hydrostatic weighing. It is considered to be one of the most accurate methods, but it may be difficult to find a place that does it.
There are also smart scales out now that measure body fat, etc., but they are apparently not very accurate.



I lift weights but have a bmi score of 24.7 currently. So weight lifting hasn’t pushed me into the overweight range.