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Thread: LBM vs Total Weight for initial macro guess

  1. #1
    Join Date
    Oct 2014
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    NM
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    184

    Default LBM vs Total Weight for initial macro guess

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    Jordan,

    I've always been curious that some nutritional protocols base all their protein/macro requirements off of LBM and others off total weight. To me, LBM makes more sense as a starting value than total weight since a 220 lbs fat guy will have different nutritional requirements than a 220 lbs ripped guy. But then again, that is why I am on the forum asking questions!

    I appreciate the start values for different goals in the TBAB article, but still, I've always been confused when nutritional protocols have the same macro requirement for two people trying to lose fat who start off at drastically different %bf. For example, 220 lbs at 30% vs 220 lbs at 20%. To me, it seems clear the 30% guy has different metabolic demands than the 20% guy.

    I was curious if you could explain the rationale between using BW vs LBM.

    I've decided it is time to recomposition since I've pushed my waistline up too high for USAF PT Test requirements, and need to start reigning it in, and figured I'd ask for your thoughts before complying.

    Thank you very much!

  2. #2
    Join Date
    Sep 2010
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    10,199

    Default

    Eh, the difference in "metabolic demands" for the example you listed is about 300kCal- so not terribly drastic and well within the realm of individual differences. These "differences" are due to past dietary history, genetics, training, etc. So no, I wouldn't necessarily agree that LBM levels affect initial macro prescription until LBM levels are wildly different.

    LBM is only part of the equation when prescribing protein intake. We also have to factor in age, gender, training level, dietary preferences, etc. LBM would be more useful for protein macro recommendations on a very overweight person, however.

  3. #3
    Join Date
    Oct 2014
    Location
    NM
    Posts
    184

    Default

    Awesome. Thanks, that makes sense. So after complying for awhile, I'll tweak as necessary per your article recommendation.

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