BMR 1426-Katch-McArdle, BMR 1810-Harris-Benedict..Confused.c

BritishDarling
BritishDarling Posts: 35
edited October 7 in Food and Nutrition
A 400 calorie BMR difference is HUGEEEE! I am now super confused and don't know which one to go with.

What do you guys think?

Cheers :-)

Replies

  • vanessaclarkgbr
    vanessaclarkgbr Posts: 731 Member
    Try this hun: http://health-connexion.com/body/calorie-requirements-explained.asp and this http://www.slimming-tips.com/Harris-Benedict-Equation-Katch-McArdle.html
  • xraychick77
    xraychick77 Posts: 1,775 Member
    harris benedict is the one that most experts agree is more accurate
  • kyle4jem
    kyle4jem Posts: 1,400 Member
    To add fuel to the fire, there's also the Mifflin-St.Joer calculation... which is what MFP uses...


    The Mifflin-St. Jeor equation is as follows:

    For Men: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
    For Women: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161


    For me personally, currently there is a 127kc difference in BMR between HB and MStJ or 160kc based on TDEE. But for my goal weight of 65kg, that drops to 17kc for BMR and 21kc for TDEE ... and it's the TDEE factor that's a bit wooly because it can be anything between 5-10% (I use 5%)

    I'm currently eating to my goal TDEE based on lightly active so I don't really factor in Exercise Calories into that although it does give me a buffer zone if I do go over my TDEE goal.
  • carrie_eggo
    carrie_eggo Posts: 1,396 Member
    If you have a good understanding of your body fat and lbm the Katch-McArdle is more accurate.....imo.
  • carrie_eggo
    carrie_eggo Posts: 1,396 Member
    go with the one that produces results.

    This too
  • Mike523
    Mike523 Posts: 393 Member
    A 400 calorie BMR difference is HUGEEEE! I am now super confused and don't know which one to go with.

    What do you guys think?

    Cheers :-)

    In order for these formulas to vary that much, you would need to have an unusually high body fat percentage (Katch-McArdle uses your body fat percentage/lean body mass in the equation).

    Are you sure you calculated correctly? Try this:

    http://www.freedieting.com/tools/calorie_calculator.htm

    If you go into Advanced Options you can choose between the different formulas. For Katch-McArdle you need to know your body fat percentage.
  • CMmrsfloyd
    CMmrsfloyd Posts: 2,380 Member
    A 400 calorie BMR difference is HUGEEEE! I am now super confused and don't know which one to go with.

    What do you guys think?

    Cheers :-)

    In order for these formulas to vary that much, you would need to have an unusually high body fat percentage (Katch-McArdle uses your body fat percentage/lean body mass in the equation).

    Are you sure you calculated correctly? Try this:

    http://www.freedieting.com/tools/calorie_calculator.htm

    If you go into Advanced Options you can choose between the different formulas. For Katch-McArdle you need to know your body fat percentage.

    If you haven't had a professional BF% analysis done, how do you decide what number to use? I put my information on different sites that use different measurement points on the body and come up with anywhere form 22%-28%, how do I choose which of those numbers to use or should I go with something in the middle to account for those online calculators being general estimates?
  • amonkey9
    amonkey9 Posts: 94
    I'm just curious....I know you're not supposed to rely on BMR calculators but how close should you stick with them ? If that made sense?
  • BritishDarling
    BritishDarling Posts: 35
    Thanks for the replies guys :-)

    I shall go with HB because i don't know for sure what my BF% is and see how it goes
  • ManniVille
    ManniVille Posts: 1
    As a trainer, I played around with both formulas (and others) a lot. I document my results. I use the tools provided on different sites and use the formula to calculate them myself. I think the formulas will yield results with lower variance when your body fat percentage is in healthy range. and I don't mean 6 packs ripped abs healthy...(side note: that is actually below the healthy level of body fat but not necessarily below the essential body fat %) Whenever I use BF% above healthy range or below it, then the results between the HB and KmA formulas are fairly close. at 15% percent body fat, I get a bmr of 1970 w/ HB formula and 1990 with the KmA formula, which in fact DOES take your BF% into account. The greater the muscle mass, the more calories you will burn. Hence if your BF% is very high then, yes you will get a fairly high bf %. However, I can't imagine you calculated the KmA correct if you don't know your Bf%. That formula takes into account your lean body mass.

    Listen to those who tell you to adjust based on trial and error. The formulas serve as a guidance, and you're not burning the same exact number of calories everyday. unless you're repeating the exact routine everyday, eating the same exact amount of food, sleeping exact same amount of time, exercising at exact same intensity same amount of time, etc... the formula is a guide not an absolute factor in TDEE. so Adjust as necessary and don't stress.

    btw, my personal preference is the kma formula. It makes sense to take into account your lbm. just think about it!
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