Calorie deficit going to my head: stupid BMI question

Discussion in 'General Weight Loss Discussion' started by perseph0ne, 25 August 2008 Social URL.

  1. perseph0ne

    perseph0ne Full Member

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    I have maths a-level, but my brain has turned to mush. Does your BMI fall more quickly at higher weights or at lower weights? I should be able to work this out but I can't.:eek:
     
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  3. babycake

    babycake Please kick my butt!!

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    the speed of it falling is dependent on how much you loose each time. ie the higher the total weight the higher the BMI. i think
     
  4. perseph0ne

    perseph0ne Full Member

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    That's not quite what I meant, I think. Because there's a square in the equation (m2) 6 lbs off would result in a different amount of BMI lost when you're at, say BMI 30, than if you're at BMI 20. I just can't work out whether it's more at a higher or lower weight, IYSWIM? I think your BMI falls faster if you're bigger and lose 6lbs but I'm not totally sure....
     
  5. totty

    totty Personal Trainer

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    Unfortunately your BMI falls quicker the lighter you are...

    for example

    If you were 10st 7lb = BMI 23
    If you were 10st = BMI 21.5 (1.5 difference)

    If you were 20st 7lb = BMI 44.5
    If you were 20st = BMI 43.5 (1 difference)

    :sigh:
     
  6. Mixxi

    Mixxi Full Member

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    I've wondered that myself before actually. How odd that the points go down quicker when your BMI is already healthy. :confused:
     
  7. Carolanski

    Carolanski Back to it!

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    Its because when you weigh less - half a stone is a higher percentage of your body weight

    At 20.5 stone (287lbs) - 7lbs = 2.44% of your body weight
    at 10.5 stone (147lbs) - 7lbs = 4.76% of your body weight

    Carol x
     
  8. perseph0ne

    perseph0ne Full Member

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    Thank you!

    Actually I don't mind that. I know I have a long way to go to get to "healthy" and I think it will spur me on knowing my BMI is dropping faster as I get closer to my goal.
     
  9. little*red

    little*red Don't worry, be happy :)

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    Thanks for that explanation carolanski it all makes sense now :).
     
  10. totty

    totty Personal Trainer

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    thats a better way of saying it ;) lol x
     
  11. Mixxi

    Mixxi Full Member

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    Oh I get it now :eek: hehe thanks
     
  12. Dom1979

    Dom1979 Gold Member

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    Maths=pain

    :giggle:
     
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