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  1. #1
    Registered User moojeni's Avatar
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    Got a DEXA scan. It says 18.9% BF. Is this right?

    First of all, I want to say that I'm a long distance runner. I TRY to be as skinny as possible.
    I got a DEXA scan the other day, and today, when I saw the results, was surprised to see that I'm 18.9% body fat (!!!). I didn't know I was so fat, wtf?
    I'm 179 cm and only 61.5 kg, so really skinny.
    According to the DEXA scan, I have 11.1 kg of FAT!.

    What do you think? Is this right or there is a mistake?
    I thought I was around ~12%-13%....
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  2. #2
    team ketchup AdamWW's Avatar
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    Originally Posted by moojeni View Post
    First of all, I want to say that I'm a long distance runner. I TRY to be as skinny as possible.
    I got a DEXA scan the other day, and today, when I saw the results, was surprised to see that I'm 18.9% body fat (!!!). I didn't know I was so fat, wtf?
    I'm 179 cm and only 61.5 kg, so really skinny.
    According to the DEXA scan, I have 11.1 kg of FAT!.

    What do you think? Is this right or there is a mistake?
    I thought I was around ~12%-13%....
    That seems off to me

    Looks more like 13%

    DEXA can be effected a lot by hydration and food in your system, perhaps that messed up the results
    The power of carbs compels me!
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  3. #3
    Registered User moojeni's Avatar
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    Originally Posted by AdamWW View Post
    That seems off to me

    Looks more like 13%

    DEXA can be effected a lot by hydration and food in your system, perhaps that messed up the results
    Thanks! That's weird. I got the scan early in the morning. I was fasted and didn't drink any water for the 2 hours before the test. The night before I ate a really light dinner, so I was with my stomach 100% empty.
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    team ketchup AdamWW's Avatar
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    Originally Posted by moojeni View Post
    Thanks! That's weird. I got the scan early in the morning. I was fasted and didn't drink any water for the 2 hours before the test. The night before I ate a really light dinner, so I was with my stomach 100% empty.
    That could be the reason then.

    AFAIK Dexa assume 'normal' hydration levels...
    The power of carbs compels me!
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  5. #5
    Registered User moojeni's Avatar
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    Originally Posted by AdamWW View Post
    That could be the reason then.

    AFAIK Dexa assume 'normal' hydration levels...
    Thanks. I didn't want to skew the results, since I knew that drinking a lot of water before the test would typically give a higher LBM reading, and less bf%.
    I drank normally until 2 hours before the test. I'm still not sure how not drinking for only 2 hours would screw up the results so much. I mean, if I'm really around 13%, how can not drinking water for the 2 hours before the test put my body fat percentage almost 6% higher?
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    team ketchup AdamWW's Avatar
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    Originally Posted by moojeni View Post
    Thanks. I didn't want to skew the results, since I knew that drinking a lot of water before the test would typically give a higher LBM reading, and less bf%.
    I drank normally until 2 hours before the test. I'm still not sure how not drinking for only 2 hours would screw up the results so much. I mean, if I'm really around 13%, how can not drinking water for the 2 hours before the test put my body fat percentage almost 6% higher?
    No idea man... that’s one reason I never got one... the results can be all over the place
    The power of carbs compels me!
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    Han shot first! TolerantLactose's Avatar
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    Originally Posted by moojeni View Post
    Thanks. I didn't want to skew the results, since I knew that drinking a lot of water before the test would typically give a higher LBM reading, and less bf%.
    You probably skewed it the other way and wound up overestimating your bf%
    I can tell time. Time cannot tell me.

    Formerly LactoseTolerant. I'm not very imaginative.
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    Registered User snailsrus's Avatar
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    Originally Posted by AdamWW View Post
    No idea man... that’s one reason I never got one... the results can be all over the place
    This thread is a good example even with tests out there that can be better at body fat readings there still are flaws.

    Also, knowing your exact bf doesn’t matter much. If you need to lose 20 lbs you need to lose it. If you want to gain muscle/size and strength if you’re already lean you need to eat.

    Op I don’t wouldn’t sweat it. You’re lower than 18. You don’t even have a ton of mass over all. Personally I would bulk slowly and gain some more muscle
    Last edited by snailsrus; 03-01-2021 at 04:34 PM.
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  9. #9
    Train hard play harder Tommy W.'s Avatar
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    Please don't tell me you're trying to lose fat
    If you don't get what you want you didn't want it bad enough
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  10. #10
    Registered User moojeni's Avatar
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    Originally Posted by Tommy W. View Post
    Please don't tell me you're trying to lose fat
    Didn't you read my post? I'm a long distance runner. I'm not trying to lose fat, nor to gain muscle.
    I'm definitely skinny enough right now. I was just curious to know my actual body fat, that's it.
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  11. #11
    OCB Pro smokinal's Avatar
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    I guessed 13 as well
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    Registered User moojeni's Avatar
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    Originally Posted by snailsrus View Post
    This thread is a good example even with tests out there that can be better at body fat readings there still are flaws.

    Also, knowing your exact bf doesn’t matter much. If you need to lose 20 lbs you need to lose it. If you want to gain muscle/size and strength if you’re already lean you need to eat.

    Op I don’t wouldn’t sweat it. You’re lower than 18. You don’t even have a ton of mass over all. Personally I would bulk slowly and gain some more muscle
    Thanks, man. I don't really want to gain much muscle (if any at all) on my upper body, since that is pretty much dead weight for long distance running. I could surely recomp a bit, though.
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  13. #13
    Registered User moojeni's Avatar
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    Originally Posted by TolerantLactose View Post
    You probably skewed it the other way and wound up overestimating your bf%
    You're right. Damn
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  14. #14
    Train hard play harder Tommy W.'s Avatar
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    Originally Posted by moojeni View Post
    Didn't you read my post? I'm a long distance runner. I'm not trying to lose fat, nor to gain muscle.
    I'm definitely skinny enough right now. I was just curious to know my actual body fat, that's it.
    Why does it matter what a machine says they're never accurate anyway and just fu#k with your head. This is a bodybuilding site anyway and not a distance running site.
    If you don't get what you want you didn't want it bad enough
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    Registered User air2fakie's Avatar
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    Originally Posted by snailsrus View Post
    Also, knowing your exact bf doesn’t matter much. If you need to lose 20 lbs you need to lose it. If you want to gain muscle/size and strength if you’re already lean you need to eat.
    ^Exactly. Plus, at least no one gets upset when the guesses are low bf %s.
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