Body Mass Index

Body mass indexThe Body Mass Index is a simple indicator of the relationship between your height and your weight. If your BMI is above 25 you are considered overweight and if your BMI is above 30 you are considered obese.

Instructions:
1. Measure your height and weight and enter values
2. Note that the intepretation of the result do not apply to people whith an abnormal muscle mass.

BMI
22.5
Normal weight
Height
ft' in''
170
Weight
lbs
143

Background:

Body mass index is a useful tool for assessing overweight in populations. It is however a very unprecise evaluation of overweight on an individual level as muscularity and general frame size of the body is not taken in to account.

Classification of overweight in relation to BMI

Classification
BMI (kg/m2)
Underweight
<18.5
Normal weight
18.5-24.9
Overweight
25.0-29.9
Obesity class I
30.0-34.9
Obesity class II
35.0-39.9
Obesity class III
> 40

 

References:

Preventing and Managing the Global Epidemic of Obesity. Report of the World Health Organization Consultation of Obesity. WHO, Geneva, June 1997.

Quetelet LAJ. Sur I'homme et le developpement de ses facultes, ou essai de physique sociale. Paris: Bachelier, 1835. (The original BMI-reference)

Comments  

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#69 fatima 2014-07-06 00:35
Hey, I don't know if to disagree with this, or not.
I am 13 years old, and weigh 110pounds, and
measure 5'5 I guess I'm pretty light. I've been trying
To gain some weigh but its harder then what it
Looks like. Why???? Because I want to gain weigh
The healthiest way possible
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#68 asdf 2014-06-18 04:48
Quoting Alysia C.:
I disagree with this entire bmi thing. I am 35, 171lbs, and 5'10. This bmi calculation has me at overweight. My body fat is only 15 percent. I'm a bodybuilder and get it measured monthly. Muscle weight more than fat.


"Note that the intepretation of the result do not apply to people whith an abnormal muscle mass"
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#67 Lucas 2014-06-18 02:06
Quoting Lucas:
Quoting Alysia C.:
I disagree with this entire bmi thing. I am 35, 171lbs, and 5'10. This bmi calculation has me at overweight. My body fat is only 15 percent. I'm a bodybuilder and get it measured monthly. Muscle weight more than fat.


[quote name+"BaseBall11"]This website is trash. Its terrible, and it should be taken off of the web! The information is totally wrong, and even doctors have said this is totally off. If your body makes up over half your body weight or something of that nature, you shouldn't be classified as obese. This is horrible.


[quote name+"BaseBall1 1"]Lebron James is 6ft 8" and weighs 250 pounds. This website marks him as overweight. Case closed!!!!!
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#66 Lucas 2014-06-18 02:00
Quoting Alysia C.:
I disagree with this entire bmi thing. I am 35, 171lbs, and 5'10. This bmi calculation has me at overweight. My body fat is only 15 percent. I'm a bodybuilder and get it measured monthly. Muscle weight more than fat.


[quote name+"BaseBall1 1"]This website is trash. Its terrible, and it should be taken off of the web! The information is totally wrong, and even doctors have said this is totally off. If your body makes up over half your body weight or something of that nature, you shouldn't be classified as obese. This is horrible.
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#65 Alysia C. 2014-06-14 13:33
I disagree with this entire bmi thing. I am 35, 171lbs, and 5'10. This bmi calculation has me at overweight. My body fat is only 15 percent. I'm a bodybuilder and get it measured monthly. Muscle weight more than fat.
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#64 Blanca 2014-06-03 21:18
I'm 5'6 and weight 170. i want to get bqack to my 130 but its sooo hard!!!
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#63 Cristina 2014-06-01 04:57
I'm 5'6'' and 114lbs is this overweight?? I don't look overweight but idk
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#62 Chloe 2014-05-25 09:54
I'm 16 years old and 19.8 BMI
That's good , right?
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#61 Private 2014-04-27 23:53
Quoting larrika:
Quoting MILA:
IM 19 260 LBS 5'7'' AND HAVE A BMI OF 40.7 IDK BUT IVE ALWAYS BEEN OVER WEIGHT TOO BUT FOR SOME REASON I DON'T LOOK SLOPPY NOR OVER WEIGHT YET U CAN FEEL THE EFFECTS OF HAVING EXCESS WEIGHT SO THE NUMBERS DON'T LIE U NEED TO TAKE BETTER CONTROL OF IT INSTEAD OF JOGGING RUN. INSTEAD OF LIFTING WEIGHTS DO SIT UPS AND PUSH UPS I NOTICED THAT THOSE INSTANTLY CONTRIBUTE TO WEIGHT LOSS ON THE BODY.:)
P.S. GO TO YOU TUBE THEY HAVE GREAT WAYS TO LOOSE WEIGHT!
*GREAT BLESSINGS

loveit

I am about 1.6 units overweight yet i look horrible
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#60 Mari 2014-04-18 04:59
Dang I'm like really overweight.. My vim is 35.5 !! I'm 220 pounds and I'm 5,6 ! I don't know how to loose weight it's so hard :(
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#59 Stacia 2014-04-08 23:27
Hey, this is to the 12 year old girl that wants to loose weight but called her self "a lazy ass". It's okay time from time a lot of us are lazy butm I honestly feel if your going to loose weight don't try to loose too much because at 12 your body is freshly in puberty. As a female it is normal and safe for you to have extra weight on you. Especially taking in account that you are already 5'7. Your body will she'd off some of the fat over the next 4 years. So you can bust your metabolism just eat your meals in portions through out the day. Wish you luck on your journey and love yourself
-A 18 year old teenage female
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#58 Destiny 2014-04-08 00:54
I'm a 17 year old female, I'm 5'5 and weigh 98 pounds. I work out a lot for track and I have a lot of muscle but it says I'm underweight.
Oh and underneath the calculator it says it does not take muscle mass into consideration.
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#57 David 2014-04-06 06:23
I'm 17 5'6 and 175 lbs i feel like it wouldn't be good to be at 154 lbs
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#56 Mel 2014-04-01 16:56
It's nice to finally get a answer on how much I should weight for my height now time to work on losing weight :)
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#55 Dandara Rimbaud 2014-03-10 21:52
I am 5'7 and 12 years old. I am about 168 pounds, and i feel really fat compared to every single person in my middle school Like everyone is healthy compared to me. Dieting has helped out, because I am not addicted to eating, I am just kind of a lazy ass, how should i lose weight if I hate working out. Anyway, i really want to lose weight even though I am at a boarder line case of being over weight, but really fat! I am already tall for my age, like really, and want to be skinny. How much weight should I lose, and how should I, please respond, and don't judge. :)
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#54 matthew 2014-02-23 15:30
Bmi say that we are 2D not 3D that is some people are over wieghwent they don't look it!
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#53 Becki 2014-02-20 23:03
I'm 5:7 and I weigh 109lbs and apparently my bmi is 17 but yes I have an eating disorder and have an addiction to loosing weight but need to get out of it but don't know how x
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#52 butterfly 2014-01-31 07:10
[

Well believe it or not just s nice walk every day to start does wonders and the best part is that walks are free, also, another very easy form of exercise is in the pool. And there are many things you can do such as work your legs even, with virtually no impact. Don't feel pressured into going to the gym or anything, like I said before, just start out slowly with walks and pretty soon it will just be second nature to you. :-)
quote name="Caitlin"] Ok well im 5' 8'' and i weigh 260. I knw im over weight but damn im at 39.5 BMI and im miserable. Wish i knew how to lose some weight
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#51 steve gore 2014-01-08 20:29
Wow I must be significantly underweight my bmi is 12
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#50 Somuah Edward 2013-12-24 16:37
thanks just found out my bmi
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#49 Becca 2013-12-19 21:03
Guys, this calculator says I am overweight boarder line obese, however I am a rower and work out three hours a day and have abs. Obviously this calculator is not completely accurate. It assumes all of your weight is fat, and it does not consider how much muscle you have. Don't let this calculator discourage you.
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#48 Courtney 2013-12-15 05:55
I'm 5'5", and 110, my bmi is 18.3. About a month ago I weighed 135 lbs, bmi 22.5. Yay, it's been working. Just a few more pounds to go.
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#47 Brian 2013-12-08 00:29
I am 6'5 and weight a healthy 230. I work out a ton (job requirement) I have little to no fat and this says I am over weight.

I have weighed anywhere from 210 to 250 depending on if I was looking for a lean endurance weight or heavy lifting weights to build muscles work outs. This isn't an accurate measurement of health.
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#46 Mike 2013-12-05 18:24
According to this, my BMI is 25.6

I am 6 feet tall, 189 lbs 33.5 inch waist and 50 inch chest. I'd say I am above average, but what's your opinion?
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#45 tammy 2013-12-01 04:25
Im 54 weigh 105 and am 5ft 6 inches tall. Is this good or baf?
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#44 Astha 2013-11-30 15:53
my bmi is 22 n height 5'9 n figure 36-27-36.. wohoo.. simply awesome..
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#43 Aravind 2013-11-30 01:29
M age of 26 and am 5'11 and weigh 220 lbs.it all happened because after accident I have meniscal tear and ligament tear.i can't go to gym, tell me how can I reduce weight
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#42 Anonymous 2013-11-24 16:06
Quoting Blah:
I'm 21 and I'm 5'5" I weigh 168 so I'm overweight?
I don't even look overweight,I work out everyday.
I guess I must be doing something wrong.


Blah, you are not necessarily overweight, considering that you work out every day and do not believe that you look overweight. Keep in mind that muscle weighs more than fat.
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#41 Blah 2013-11-18 17:09
I'm 21 and I'm 5'5" I weigh 168 so I'm overweight?
I don't even look overweight,I work out everyday.
I guess I must be doing something wrong.
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#40 Chiri 2013-11-16 07:58
Caitlin, and everyone who needs to lose weight, I was obese two months ago and now I will shortly move from overweight to normal. I didn't do much exercise other than leisurely walking and I lost lots of weight because I went on an anti-candida diet. Read about it on google. I bet most of you have it. My sisters and mom also have it but only one of my sisters and I went on the diet and we both lost the same amount of weight. And we're very happy on the diet because we don't have to limit or count calories or ever do strenuous exercise. I hope that all of you can get the courage to start the diet and enjoy your lives more. I've been suffering with my weight and some other nasty symptoms since I was young so I'm gonna continue to work hard on the diet and get to a weight were I am fit and healthy and don't need to worry too much about how much I eat. Good luck to all of you who are also trying to lose some weight. Please don't starve yourselves and harm your body!
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#39 Lawrence Grantham 2013-11-16 00:32
Quoting diana rose:
I am 15 years old and 103 pounds at a height of 5'4. My BMI is listed as 17.7, but I don't feel like I'm underweight. I have a 22 inch waist. so confused! I don't feel like this is accurate.


This is because you're a teenager, teenagers BMI is calculated differently to adults because they aren't fully developed yet
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#38 larrika 2013-11-15 20:21
Quoting MILA:
IM 19 260 LBS 5'7'' AND HAVE A BMI OF 40.7 IDK BUT IVE ALWAYS BEEN OVER WEIGHT TOO BUT FOR SOME REASON I DON'T LOOK SLOPPY NOR OVER WEIGHT YET U CAN FEEL THE EFFECTS OF HAVING EXCESS WEIGHT SO THE NUMBERS DON'T LIE U NEED TO TAKE BETTER CONTROL OF IT INSTEAD OF JOGGING RUN. INSTEAD OF LIFTING WEIGHTS DO SIT UPS AND PUSH UPS I NOTICED THAT THOSE INSTANTLY CONTRIBUTE TO WEIGHT LOSS ON THE BODY.:)
P.S. GO TO YOU TUBE THEY HAVE GREAT WAYS TO LOOSE WEIGHT!
*GREAT BLESSINGS

loveit
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#37 Caitlin 2013-11-11 21:16
Ok well im 5' 8'' and i weigh 260. I knw im over weight but damn im at 39.5 BMI and im miserable. Wish i knew how to lose some weight
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#36 Alisa 2013-11-09 21:35
Being 111lb when you are 5' 5" is insane this thing is totally jack
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#35 Tai 2013-10-27 21:14
I found the site very helpful, now I know how much more weight is healthy to put on
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#34 Amber 2013-10-02 02:13
Hmm, my BMI is 15 and the picture looks horrific like a zombie or something.. But I don't look like that really, I have loads of energy and am very happy. But bmi does not account for genetics or metabolism so yeah.
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#33 Tina 2013-09-27 17:00
I'm 24 years old. 5'2" ish and I'm 98 lbs. it says I'm underweight, however, my doctor says I'm normal weight. I guess the best thing to do is listen to your doctor rather than an internet calculator. I believe my doctor over this thing
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#32 Haley 2013-09-21 02:36
Quoting Heather McCartney:
108 pounds is normal!? Crazy! I'm 5' 4" and I am perfect at 145. It's saying it's borderline overweight? Crazy! No wonder there's eating disorders!

Im 5'4 and 148 and I think its crazy they consider like 111 is okay to be at this height its crazy
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#31 souryadeep 2013-09-17 11:39
Im 16 yrs old with a height of 5'11". I wring about 95kgs. I have broad shoulders and an overall broad structure. What should be ideal weight for me
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#30 S 2013-09-11 17:40
Quoting debbie:
im 22 years old im 105 lbs and 5ft 6 my bmi is 16.9 is this normal

....

....


...

well what did the calculator say?
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#29 debbie 2013-09-05 22:57
im 22 years old im 105 lbs and 5ft 6 my bmi is 16.9 is this normal
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#28 Amy 2013-09-04 18:58
I always thought i was overweight, but this website has shown me that i am normal!
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#27 Wes 2013-08-22 01:46
This thing shows me class lll with an BMI of 50.4 that scares me a little. Not sure what that means or what I should do. Im not even 33 years yet.
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#26 megan 2013-08-21 18:03
I think this is wrong! it shows on here that i am obese. i may be a little heavier set, but i never considered myself OBESE! no wonder girls and women have problems with they way they think about their body.
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#25 diana rose 2013-08-07 01:08
I am 15 years old and 103 pounds at a height of 5'4. My BMI is listed as 17.7, but I don't feel like I'm underweight. I have a 22 inch waist. so confused! I don't feel like this is accurate.
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#24 Danii 2013-07-24 21:29
This is very helpful im 5'8 and weigh 168
Im 16 btw im a girl. Im overweight :(
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#23 Ian Bendt 2013-06-01 11:29
So I am 5'8" weight 160lbs and this marks me at just under overweight. I find this somewhat odd since the average size shirt I wear is small, if not extra small, and my pants size is 29w 30l.
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#22 MILA 2013-02-22 13:03
IM 19 260 LBS 5'7'' AND HAVE A BMI OF 40.7 IDK BUT IVE ALWAYS BEEN OVER WEIGHT TOO BUT FOR SOME REASON I DON'T LOOK SLOPPY NOR OVER WEIGHT YET U CAN FEEL THE EFFECTS OF HAVING EXCESS WEIGHT SO THE NUMBERS DON'T LIE U NEED TO TAKE BETTER CONTROL OF IT INSTEAD OF JOGGING RUN. INSTEAD OF LIFTING WEIGHTS DO SIT UPS AND PUSH UPS I NOTICED THAT THOSE INSTANTLY CONTRIBUTE TO WEIGHT LOSS ON THE BODY.:)
P.S. GO TO YOU TUBE THEY HAVE GREAT WAYS TO LOOSE WEIGHT!
*GREAT BLESSINGS
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#21 Doug 2013-01-15 23:29
I think one of the worst tools for health and wellness. I am 54, weigh 222 lbs, I am more muscular and stronger now then when I was in college playing baseball, running, and lifting weights all the time, at 180 lbs. I know I could lose 25 lbs, but this ranks me as obese. 5'9, 34 inch waist. bench over 300 lbs, leg press 450.
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#20 Weighalotyetsmall 2012-10-14 07:11
Okay, 5'9", 28 inch waist, but weigh 185 pounds. I'm confused. I see women my height who weigh 145 to 150 pounds and wear the same clothing size and they're not classified as overweight yet I am. I am not very muscular either so this is seriously freaking my mind right now. Seriously,I'm starting to wonder if I have some weird freaky disease yet to be discovered by science?
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#19 mohammad 2012-09-28 10:48
HOW CAN I PRINT MY BODY MASS INDEX???
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#18 Heather McCartney 2012-09-21 20:07
108 pounds is normal!? Crazy! I'm 5' 4" and I am perfect at 145. It's saying it's borderline overweight? Crazy! No wonder there's eating disorders!
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#17 Jason 2012-09-17 02:33
I thought my BMI is overweight, but the result 22.6, which is normal. I'm 15, male, 5'11, my weight increasing to 162lbs from 155lbs. I'm quite happy with the result although my weight has increasing.
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#16 Roman Barrios 2012-05-25 00:25
This is an usefull apps. thanks
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#15 Ashutosh Kumar 2012-05-05 11:13
im very excited you to very helpfull site in body manager thanks very usefull site
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#14 Morten 2012-04-30 00:30
Zullo - Thanks for noticing. The problem was that the height dial had more precision than the display of the units. For example - you could set the dial in the high end of 5feet 6" or in the low end of 5feet 6" and this would affect the result. The dial has now been fixed so it has the same resolution as the display.
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#13 zullo 2012-04-28 07:44
How accurate is this? I calculated my BMI many times before and all of them consistently said my BMI was 18.3 at my height and weight but this one says it's 17.9
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#12 Kristi 2011-12-08 10:01
mine is 40.8 :sad: I'm only 16 and have been trying everything I can do to lose weight and it doesn't work. I have been jogging for and hour each day for the past few months and been cutting down on what I eat (I didn't eat much to begin with and I hate sweets) but I have managed to gain weight and its very frustrating.. I'd rather be underweight than overweight.
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#11 supercoup 2011-10-13 00:53
Checking your BMI will give you an accurate idea of how much weight you need to lose. What it does not show you is how to achieve it. If you can lose weight naturally is better than relying on weight reduction pills but if you are struggling appetite suppressants and fat burners might help you.
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#10 Onida Vumint 2011-08-17 12:05
Is it really helpful in assessing our health? Being obese put individuals at a higher risk of health problems, but two new studies published today call this realization into a question. The studies indicated that the BMI scale might not be a correct health predictor. Related article I read: BMI and obesity may not predict health problems (www.newsytype.com/10159-healthy-obese) . Realization that we should not rely on just one medical test with regards to our health condition.
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#9 Brianed1 2011-03-18 06:01
I have only 11% body fat which is very low and have a BMI of 23.8. I am by no means stocky either. I am currently at my training weight for triathlon. If I were to have an 18.5 BMI which is still 'healthy' I would have to drop 15kg! I would look absolutely emaciated! Given that healthy males have a lower percentage of body fat, which weighs less, along with the fact that they have a broader bone structure that is designed to facilitate bigger muscles, they should be given a higher 'healthy' range than females on the BMI calculator. I could not imagine a male with BMI 18.5 and it is no coincidence that most females would rather not imagine this either!
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#8 Kristina Bradford 2011-02-16 04:39
I can appreciate that people are becoming more health conscious and we are being provided with more tools to get there, but I feel that they should come up with something more personalized. According to this BMI calculator I am obese. I will tell you if I were to loose as much weight at this "advises" me to then I would be very sick. My natural weight with my body type is much more than this allows. If people with poor self esteem actually took this BMI into consideration then, we will be creating poor self body images. Not all body types fit into this calculator.
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#7 Morten Z 2010-09-30 21:33
Dave - that can be true in some cases - especially if you talk about activities like running. On the other hand, the more muscular person is likely to have more muscle control around the joints, which prevents joint problems.
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#6 dave 2010-09-30 15:59
Even if its muscle thats causing the overweight condition, for health problems like joint pain in the legs or in the spine that doesnt really matter. It is the raw mass that counts there. Of course being overweight because of muscles instead of fat is healthier on the internal organs, it still is very hard on the joints. So working out to the point of "muscle obesity" is not too healthy either, at least not for the joints.
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#5 James 2010-06-19 20:32
I find BMI to be useless, or at least wildly invalid for people that are outside the average stature. I'm 6'5" and with my frame, my natural weight is around 240, and that's with very little body fat.
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#4 trk 2010-05-19 10:54
it's very easy to ignore, actually. it only accounts for weight and height, with no consideration of what makes up that weight. Body composition is a waaaaaay more important number, but its not so easy to measure.
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#3 saqib 2010-03-18 05:33
it is very help ful
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#2 Faraz Ahmed 2009-12-09 12:41
this is the first time i visited your site and found it very helpful. how can one ignored such important part of life that is health.
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#1 Dustin Winnekens 2008-11-04 19:13
does not account for lean muscle mass.
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