ok i have been wondering this for awhile. how does a lb of fat relate to a % of body fat? in other words, lets say an individual loses 10 lb of fat, how would that relate to %?
[quote]Ballin4Christ32 wrote:
ok i have been wondering this for awhile. how does a lb of fat relate to a % of body fat? in other words, lets say an individual loses 10 lb of fat, how would that relate to %?[/quote]
If he started out with 25% bf, and weighed 200lbs (for the sake of easy math), he would have 50lbs of fat on his body.
If he lost 10 lbs, he would now have 40lbs of fat on him and would weigh 190lbs (assuming no muscle was lost or gained).
Now he has 21%bf.
So losing those 10 lbs would translate to losing 4%bf overall.
(lb bf)/(total weight)*100
then
((lb bf)-(change bf))/(total weight)*100
You need to know math. Plus, it depends on the person you are talking about. Specifically, how much does the person weigh and what is the bodyfat %.
Once again, it involves math. If you don’t know math, and the above data, you can’t relate 10 lbs of fat lost to a percentage.
It depends on your total body weight and you lean mass. If I dropped ten pounds, it wouldn’t change my body fat as much as a 150 pound guy who lost the same amount of weight.
Body Fat % = Weight of Fat / Total Body Weight * 100
or
Weight of Fat = Total Body Weight * Body Fat Percentage / 100
So, if you’re 200 pounds, and you’ve got 40 pounds of fat:
(20 / 200) * 100 = 20% body fat.
You can go the other way, too: If you’re 200 pounds, and you’ve got 40% body fat:
200 * 20 / 100 = 40 pounds of fat.
Now, let’s say you drop 10 pounds, and it’s all fat. You’ll weight 190 pounds, and 30 of it will be fat:
(30 / 190) * 100 = 15.78% body fat.
More realistically, let’s say you dropped 9 pounds of fat, and 1 pound of muscle. That’s 190 pounds, 31 pounds of fat:
(31 / 190) * 100 = 16.32% body fat.
So, without knowing your initial weight and BFP, and how much lean muscle you loose while dropping said adiposity, there’s no way of knowing what “dropping ten pounds” will do for you.
That’s a rediculously easy math problem and I’m kind of embarrassed it had to be asked, unless the OP is 5.
[quote]conorh wrote:
That’s a rediculously easy math problem and I’m kind of embarrassed it had to be asked, unless the OP is 5.[/quote]
I don’t think he even knew that % body fat literally means the percentage of your body that is fat.
Related Question:
How do you get it measured? Do you go to the doctor every time you want to learn your BF percentage? Do they have the facilties at gyms? Or can this be done at home?
[quote]dancar wrote:
Related Question:
How do you get it measured? Do you go to the doctor every time you want to learn your BF percentage? Do they have the facilties at gyms? Or can this be done at home?[/quote]
Home Biopsy kit.
to be honest, i just never thought about how to relate them to each other. sorry if it was very obvious, guess im just having one of those days
[quote]conorh wrote:
That’s a rediculously easy math problem and I’m kind of embarrassed it had to be asked, unless the OP is 5.[/quote]
Round numbers make better examples, and I’m sure that the guy is/was capable of doing the math, he just needed to be shown what math to do. We were all there once.
For example, when did you learn that BFP was body fat by weight, not volume? It seems intuitive, but when was the first time you actually saw that written somewhere, instead of just making the assumption?
[quote]thomas.galvin wrote:
conorh wrote:
That’s a rediculously easy math problem and I’m kind of embarrassed it had to be asked, unless the OP is 5.
Round numbers make better examples, and I’m sure that the guy is/was capable of doing the math, he just needed to be shown what math to do. We were all there once.
For example, when did you learn that BFP was body fat by weight, not volume? It seems intuitive, but when was the first time you actually saw that written somewhere, instead of just making the assumption?[/quote]
I think most people made the assumption that it goes by weight… because going by volume would be ridiculously stupid. Unless you are using my suggested home biopsy kit ofcourse.