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How do we judge a healthy weight range? BMI is no longer valid?

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Replies

  • BillMcKay1
    BillMcKay1 Posts: 315 Member
    edited August 2016
    Packerjohn wrote: »
    Unless that person is unusually muscular a bodyfat% goal or BMI goal will result in a goal in pounds that is very similar

    I am not unusually muscular, yet I have mathematically demonstrated more than once that a better-than-average BF goal of 15% still puts me well above the very lower limit of "overweight" for my height according to BMI.
    I do have broad shoulders and a disproportionately long torso (that latter is a factor I had overlooked), but if that is enough in itself to qualify me as "unusually muscular" then there is a lot greater percentage of such folks in the general population than BMI defenders are admitting to.





    Since it just popped up, your FFMI at your goal would also put you at "the upper edge of what is humanly possible".

    Let me say that again.

    Every. Single. Measurement. of muscular potential that is commonly used says "yeah no, you don't just get to that goal just like that no matter how much you say so unless you're a one in a million person who also trains like hell for years". While you keep saying "Oh, I'm not that muscular."
    See the problem?

    Exactly. At 181cm I'm shooting for 175-180 with somewhere in the high teens BF%. Say 17 for round numbers.FFMI of 20.9. To me that is a pretty high goal to set at 44. To shoot for an FFMI at the very peak of elite natural bodybuilders and athletes at 46 is quite the goal. I hesitate to use "impossible" but when dudes in their 20 have to literally work for years to even come close to that well...lets say at 46 it is physiologically improbable to hit 6'1 220lbs at 15%BF without "enhancing" your training.

    I don't say that to be mean, but to encourage you to be realistic with your goals. Getting down to 220 is a great goal, but man I hope you won't be bummed when you don't see the ripped physique you think you will see at that weight.

    This has gotten kind of off track of BMI, but to swing it back round. 6'1 185lbs which is the top end of the BMI "healthy" range well, that looks like that dude from the link I gave at 7% bodyfat if you are "overly"muscled.

  • Packerjohn
    Packerjohn Posts: 4,855 Member
    Packerjohn wrote: »
    Unless that person is unusually muscular a bodyfat% goal or BMI goal will result in a goal in pounds that is very similar

    I am not unusually muscular, yet I have mathematically demonstrated more than once that a better-than-average BF goal of 15% still puts me well above the very lower limit of "overweight" for my height according to BMI.
    I do have broad shoulders and a disproportionately long torso (that latter is a factor I had overlooked), but if that is enough in itself to qualify me as "unusually muscular" then there is a lot greater percentage of such folks in the general population than BMI defenders are admitting to.





    Since it just popped up, your FFMI at your goal would also put you at "the upper edge of what is humanly possible".

    Let me say that again.

    Every. Single. Measurement. of muscular potential that is commonly used says "yeah no, you don't just get to that goal just like that no matter how much you say so unless you're a one in a million person who also trains like hell for years". While you keep saying "Oh, I'm not that muscular."
    See the problem?

    Yeah, with all his calculations, 6'1'. 220, 15% BF at 46 and not " unusually muscular" just does not pass the smell test.
  • BillMcKay1
    BillMcKay1 Posts: 315 Member
    Packerjohn wrote: »
    Packerjohn wrote: »
    Unless that person is unusually muscular a bodyfat% goal or BMI goal will result in a goal in pounds that is very similar

    I am not unusually muscular, yet I have mathematically demonstrated more than once that a better-than-average BF goal of 15% still puts me well above the very lower limit of "overweight" for my height according to BMI.
    I do have broad shoulders and a disproportionately long torso (that latter is a factor I had overlooked), but if that is enough in itself to qualify me as "unusually muscular" then there is a lot greater percentage of such folks in the general population than BMI defenders are admitting to.





    Since it just popped up, your FFMI at your goal would also put you at "the upper edge of what is humanly possible".

    Let me say that again.

    Every. Single. Measurement. of muscular potential that is commonly used says "yeah no, you don't just get to that goal just like that no matter how much you say so unless you're a one in a million person who also trains like hell for years". While you keep saying "Oh, I'm not that muscular."
    See the problem?

    Yeah, with all his calculations, 6'1'. 220, 15% BF at 46 and not " unusually muscular" just does not pass the smell test.

    To be fair, that is his goal, not his current.
  • Packerjohn
    Packerjohn Posts: 4,855 Member
    BillMcKay1 wrote: »
    Packerjohn wrote: »
    Packerjohn wrote: »
    Unless that person is unusually muscular a bodyfat% goal or BMI goal will result in a goal in pounds that is very similar

    I am not unusually muscular, yet I have mathematically demonstrated more than once that a better-than-average BF goal of 15% still puts me well above the very lower limit of "overweight" for my height according to BMI.
    I do have broad shoulders and a disproportionately long torso (that latter is a factor I had overlooked), but if that is enough in itself to qualify me as "unusually muscular" then there is a lot greater percentage of such folks in the general population than BMI defenders are admitting to.





    Since it just popped up, your FFMI at your goal would also put you at "the upper edge of what is humanly possible".

    Let me say that again.

    Every. Single. Measurement. of muscular potential that is commonly used says "yeah no, you don't just get to that goal just like that no matter how much you say so unless you're a one in a million person who also trains like hell for years". While you keep saying "Oh, I'm not that muscular."
    See the problem?

    Yeah, with all his calculations, 6'1'. 220, 15% BF at 46 and not " unusually muscular" just does not pass the smell test.

    To be fair, that is his goal, not his current.

    Understand. With the information given, IMO, only way the goal possibly happens is if he is a long time lifter who let his weight get away from him.
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    BillMcKay1 wrote: »
    If your waist at the navel is 47inches as you said you are pushing 40%+ in bodyfat currently. Not 34-35%. You have to be honest with yourself man. I spent a number of years telling myself I was an outlier too...

    http://www.builtlean.com/2012/09/24/body-fat-percentage-men-women/

    You can't *kitten* BF% using waist size without any reference to height (at a minimum), there's just nothing to base it on. Visually speaking, I look a lot more like the 35% pics in your link than the 40%. Actually, in the one group I look more like the 30% guy, as he visibly looks fatter than the one labeled 35%

  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    Since it just popped up, your FFMI at your goal would also put you at "the upper edge of what is humanly possible".

    You keep saying that, yet the implication would be that I'm already very close to max FFM. I just don't buy that when my forearm measurement is only 13" (least fat part of my body aside from wrist and fingers) and I know for a fact I've got a lot of room to grow in strength.
    15 pounds more muscle spread over my whole body just wouldn't be that much, especially in comparison with the extra 55 pounds of fat I'm carrying now. I would definitely look in good condition at my goals, but I wouldn't really even be bulky (compared to my basic size).

  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    BillMcKay1 wrote: »
    [
    I don't say that to be mean, but to encourage you to be realistic with your goals. Getting down to 220 is a great goal, but man I hope you won't be bummed when you don't see the ripped physique you think you will see at that weight.

    I don't expect or want to look 'ripped'. I do plan to look 'solid'.

  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    robininfl wrote: »
    MarkusDarwath, you are in zero danger of getting too thin without noticing it. You could just lose weight by dieting, work out normally, and your body composition will change for the better. Even if you are attached to being big, as a tall guy you will always be big whether skinny or fat, and you already said you have big frame, how in the world would that change if you got lean?

    15% body fat -is- lean, that's my goal. It's muscle mass that I don't intend to sacrifice.
    "skinny" to me is low fat and low muscle, like distance runners. It's not a look I like.
  • Amazon_Who
    Amazon_Who Posts: 1,092 Member
    robininfl wrote: »
    I have talked with the Fiance a lot about dysmorphia - he bulked and did gain a lot of muscle and too much fat, 200lb at 5'10" and he talked with me about feeling like he didn't want to lose mass, that it felt good in a way to be "big". He's still pretty darn muscled at 185 and has plenty to lose in the belly, but his mind is different now, he looks more toward health and less toward building mass.

    As a woman who has had trouble in the other direction, this idea of wanting to be "big" had simply never occured to me.
    Penn of Penn and Teller said when he was over 300# he liked being a monolith.
  • Kdp2015
    Kdp2015 Posts: 519 Member
    edited August 2016
    I'd also recommend waist to height measurement as a good indicator.
    I've never looked at this before, thanks. It does put me at extremely slim though whereas my bmi puts me at healthy, I guess there is a big range for both. Also I think it takes quite a big weight loss (or gain) for change in waist size, I would think it gets to a point where it's more about structure than fat..,
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    There's nothing wrong with citing experts on the subject.

    There is if someone is presenting reasoning against the generally accepted postion, and the argument in favor amounts to frequently repeated platitudes attributed to the "experts" without presenting the reasoning and data in support.

    The data in support of BMI shows it has a reasonably good correlation with overall health risks in large population samples (except that the category delineations are off and the "healthy" range should actually be 20 to 27). The idea that said relationship continues to hold on the individual level is basically an extrapolation that ignores some basic mathematical facts regarding large-sample averages. What is need are studies of the relationship between BMI and BF% on the individual level, if one is to validate or invalidate BMI as an estimate of personal fatness.
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    Even taking 21 pounds off of that pic, you are not 34% BF. Closer to 40. [/quote}

    I disagree. If my scale is reading that far off, it is outside the standard margin of error generally attributed to BIA devices, and I chose the unit I did specifically because reviews have rated it at the top end for accuracy and consistency.
    I'll be taking progress pics in a couple weeks when I hit my half-way point.
    I am 170 currently, and 5'10". My bf% is hovering around 17%. From the sounds of it, you've got 2" in height on me.

    But do you know your current muscle percentage? It's hard to tell from your profile picture, but looking at your neck it appears you're carrying quite a bit less muscle than I would personally be comfortable with.
    Again, you have plenty of weight to shed, that is not lean muscle mass. And, nowhere near single digit bf%...

    Pointing out the obvious about my present condition doesn't change the reality of how my composition would compare between 220 pounds and 185.
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    BillMcKay1 wrote: »
    We get it. You are a genetic freak that blows BMI into invalidity....


    You don't get it. I'm -not- a genetic freak. The invalidity of BMI as a personal indicator is because there is a large percentage of the population who are outside of BMI predicted norms, without being freaks.
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    There was. It was even linked earlier.
    It showed more people have too much fat while at a normal BMI than people with unproblematic amounts of bodyfat who are above normal BMI.
    Any other arguments?


    So the study showed BMI is a poor screening tool for individuals because it will miss a bunch of people who should be flagged, as well as flagging many who shouldn't be.

    If anything, the higher numbers of over-fat people with "healthy" BMI supports my position that BMI charts promote low muscle mass, because if BMI says you're good, but in reality you are above safe fat percentages then you are deficient in muscle by default.
  • coreyreichle
    coreyreichle Posts: 1,031 Member
    There's nothing wrong with citing experts on the subject.

    There is if someone is presenting reasoning against the generally accepted postion, and the argument in favor amounts to frequently repeated platitudes attributed to the "experts" without presenting the reasoning and data in support.

    The data in support of BMI shows it has a reasonably good correlation with overall health risks in large population samples (except that the category delineations are off and the "healthy" range should actually be 20 to 27). The idea that said relationship continues to hold on the individual level is basically an extrapolation that ignores some basic mathematical facts regarding large-sample averages. What is need are studies of the relationship between BMI and BF% on the individual level, if one is to validate or invalidate BMI as an estimate of personal fatness.

    That data is available, and it has been done. In fact, BMI works for about 97% of the population as a measure of healthy weight ranges, and in fact, was adjusted a couple of years back to bring it more in line with that.
  • MarkusDarwath
    MarkusDarwath Posts: 393 Member
    Packerjohn wrote: »
    You mentioned lifting weights in high school. Are you currently lifting on a regular basis?

    No. At the moment, doing physical work is my only regular exercise.
    You mentioned wearing size 36 pants with a 47 inch waist measuremnt. This would indicate lack of muscle in the legs and hips which are the biggest muscles in the body. I think there would need to be much more muscle in these areas ton get to 34% given current height and weight.

    The manufacturer's waist size is not a fair estimation. They are "relaxed fit" and I'm pretty sure I've stretched them out quite a bit. My actual measurement at the waist band (taken just now in just underwear) is 43" and my widest point hip measurement is 44.5"
This discussion has been closed.