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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To think someone that’s 7 stone and 5’4 is tiny

255 replies

101360i · 29/12/2025 14:31

And to be worried d

OP posts:
Aluna · 29/12/2025 20:23

Nucleus · 29/12/2025 20:19

Irrelevant.
BMI was designed as a population based tool, not individual.

Exactly. BMI is a very broad brush.

Dollybantree · 29/12/2025 20:32

ShesTheAlbatross · 29/12/2025 14:49

That’s what I am. I’d have to put quite a bit of effort into gaining weight (I’ve tried, because it’s hard to find clothes). There’s nothing wrong with me in terms of long term conditions or consequences of being this weight. I exercise but not excessively, I run once or twice a week and I do a bit of weight work. I got pregnant and had two healthy babies at this weight, and dropped back down to this weight within a week of giving birth both times with no effort at all. It’s just where I land.

I do worry that if I ever become seriously unwell, I don’t have a lot of spare capacity to lose weight as a side effect of illness or treatment.
But as things stand right now, I think I’m fine. I’ve been this weight my whole adult life with no issue.

Do you mind me asking what you eat in an average day? Just out of interest, I’ve no agenda.

cinquanta · 29/12/2025 20:33

Aluna · 29/12/2025 20:21

Precisely. Asian BMI index is based on the Caucasian model and doesn’t accommodate for the fact that Asians have significantly smaller build.

So more Asian women come up as underweight at their normal weight and size, just as my brother, at the other end of the scale registers as obese with lots of muscle and little fat.

Japan average female BMI is 21.7 whereas U.K. is 27.1.

It obviously does because the upper healthy range cut off is only 22.9.

Skippydoodle · 29/12/2025 20:33

101360i · 29/12/2025 14:31

And to be worried d

For many years I was 5’3” & 7st4lb. It was my perfect weight. I wish I was still that now. I felt healthy, bouncy, strong & fit!

Aluna · 29/12/2025 20:36

cinquanta · 29/12/2025 20:33

It obviously does because the upper healthy range cut off is only 22.9.

It doesn’t accommodate enough is the point. You ask Asian women how many register as being underweight.

cinquanta · 29/12/2025 20:47

Aluna · 29/12/2025 20:36

It doesn’t accommodate enough is the point. You ask Asian women how many register as being underweight.

Yet at least one study I have seen found that low BMI (under 18.5) was consistently associated with increased mortality among all Asian subgroups

https://www.ahajournals.org/doi/10.1161/circ.147.suppl_1.P333

ABeerInTheSunshineMakesMeHappy · 29/12/2025 20:51

sussexman · 29/12/2025 17:39

Specifically, 5'4" ft and 7 stone is in the "Healthy Weight" category at 19.1 BMI, but 5' and 7 stone is 16.8 and unhealthy. https://www.nhs.uk/health-assessment-tools/calculate-your-body-mass-index/calculate-bmi-for-adults

You’ve got that the wrong way round I think .

Nucleus · 29/12/2025 20:52

XmasList · 29/12/2025 18:13

Another one who claimed she often ‘forgot to eat’. This is a very common thing for people with disordered eating to say.

Or alternatively, eats when they need rather than sticking to arbitrary notions of mealtimes. An awful lot of us could learn from being more in tune with our bodies.

Aluna · 29/12/2025 20:56

cinquanta · 29/12/2025 20:47

Yet at least one study I have seen found that low BMI (under 18.5) was consistently associated with increased mortality among all Asian subgroups

https://www.ahajournals.org/doi/10.1161/circ.147.suppl_1.P333

Congrats on the googling but that doesn’t change anything.

There is poverty and malnutrition in the populations in that study - China, India and Philippines - that you see much less of in countries like Japan and S.Korea let alone Western countries.

An interesting phenomenon on these threads is the preoccupation that lower BMIs in unhealthy with little concern for the reams of evidence linking overweight and obesity’s to serious illness. Obesity now being the second biggest preventable cause of cancer in the U.K.

Biscuit94 · 29/12/2025 20:57

Depends entirely on genetics/context. Has this person always been this weight? Have they suddenly lost weight without intending to? Are there any other factors (ilness etc.) at play?
I am 5"5 and 7'7 so not worlds away from what you describe. I lost a lot of muscle postpartum due to not doing as much sport.

Pogpog21 · 29/12/2025 20:58

It depends? I’m 5’4 and used to be 7 stone 5. It was the best I looked and I still had curves but was just strong and lean. I was a size 4-6. I’m now an 8, weighing 8 stone 3.

NImumconfused · 29/12/2025 21:01

DD is currently that height and weight and is under the eating disorder team at CAMHS.

cinquanta · 29/12/2025 21:17

Aluna · 29/12/2025 20:56

Congrats on the googling but that doesn’t change anything.

There is poverty and malnutrition in the populations in that study - China, India and Philippines - that you see much less of in countries like Japan and S.Korea let alone Western countries.

An interesting phenomenon on these threads is the preoccupation that lower BMIs in unhealthy with little concern for the reams of evidence linking overweight and obesity’s to serious illness. Obesity now being the second biggest preventable cause of cancer in the U.K.

Edited

There is poverty and malnutrition in the populations in that study - China, India and Philippines - that you see much less of in countries like Japan and S.Korea let alone Western countries.

Indeed there is, and it results in sub 18.5 BMIs with the associated higher mortality rates.

pucelleauxblanchesmains · 29/12/2025 21:24

I've believed I was "in tune with my body" at various times when I was eating far too little to maintain a healthy adult weight. If you consistently undereat then your appetite cues go all wonky.

Tbh I'm going to stop commenting on this thread because it's not good for me (because it makes me think, why bother maintaining a few pounds into the healthy weight range - why not be as thin as I like? Maybe I didn't look so ill after all? Maybe I didn't need to gain weight in the first place because we've lost sight of a healthy weight!)

But l will say the language around food and eating on this site can be utterly disordered, e.g. the thread from a couple of years ago about what BMI people feel slim at. And I know this from sad experience.

Aluna · 29/12/2025 21:39

cinquanta · 29/12/2025 21:17

There is poverty and malnutrition in the populations in that study - China, India and Philippines - that you see much less of in countries like Japan and S.Korea let alone Western countries.

Indeed there is, and it results in sub 18.5 BMIs with the associated higher mortality rates.

Exactly. And that is a completely different issue from the numbers of healthy well-fed Asian women who nonetheless register in the lower to underweight BMI category.

SheSpendsAFortune · 29/12/2025 21:42

The BMI of a woman of 5ft 4 weighing 7st is only 16.8, which is underweight.

cinquanta · 29/12/2025 22:03

Aluna · 29/12/2025 21:39

Exactly. And that is a completely different issue from the numbers of healthy well-fed Asian women who nonetheless register in the lower to underweight BMI category.

Yet the WHO and the health authorities of all the countries where those women live maintain that 18.5 is the lowest end of the healthy range.

Why?

Kellph83 · 29/12/2025 23:12

KimberleyClark · 29/12/2025 18:01

Why on earth do you think you need to lose more?

Because I’ve had kids by c section and my stomach area is not how I would like it. Like I said. I’m 5ft so even a gain of 3lb notices a lot. Unless you’re petite you will not understand! It’s literally a mind F.

BringBackCatsEyes · 30/12/2025 00:31

housethatbuiltme · 29/12/2025 16:23

I was 5ft7 and 7st naturally in my teens/young adulthood.

I was slim but I had no weight related health issues and I was a size 12 (never get the everyone skinny must be 'size 0' comments, size at low weight is based on bone frame not weight).

I had always been like that (was a very tall skinny child). I did not diet or do anything to achieve it and I was active and as well as I have ever been.

I only ever gain weight when pregnant, put on a stone per pregnancy and now at peak 'BMI' and 'healthy weight' ironically have far more weight and food related issues now.

I will likely never be 7 stone again (trying to diet down to that would be ill advised) but I was that size originally completely naturally and no 'worry' was needed.

If the weight is being lost for unknown reasons, an illness or extreme dieting/lifestyle change then worry, but its not a worry if someone is always just naturally 'skinny'.

Gosh, that's a BMI of 15.3 (I knew it was low because I am an inch taller and at 9 stone have a BMI of 19.2 which is pretty slim).
Even as a teenager that would be regarded as severely anorexic.
I'm very surprised that you were a size 12 at that weight and that you menstruated.

Shmoigel · 30/12/2025 01:46

I’m 8st 10 and 5ft 1 and I look tiny after being size 16 for 25 years. This weight feels tiny and she is taller and lighter. Is she comfortable with her weight?

Roobarbtwo · 30/12/2025 02:24

What is the point of this thread? People just listing their weight and height and how fab they felt at 7 stones?

catontheironingboard · 30/12/2025 02:30

mikado1 · 29/12/2025 14:59

It's funny how different weight can look on seemingly similar bodies. I'm 5ft 3 and look horribly underweight at 8 stone but pp looks fine at 7.5.. I've a friend who's taller than me and 8 stone and looks great. So i think it's very hard to know and it is case specific but I'd be desperately underweight looking at that weight.

^^This - it all depends on the build. I’m 5ft 3 and I still didn’t look skinny at 7st 7 (my lowest adult weight), despite the fact that it’s at the lower end of a healthy weight for that height. I’m what they used to call “small-boned”, and even at 7st 7 I still had fleshy upper arms, a not insubstantial bum and a little pot belly!

(All this is pure nostalgia for me now as it’s a long while since I was anywhere near 7st 7 😭)

BringBackCatsEyes · 30/12/2025 08:51

Roobarbtwo · 30/12/2025 02:24

What is the point of this thread? People just listing their weight and height and how fab they felt at 7 stones?

It would help if OP came back and gave more info, but I suspect you’re right, they just wanted to start a daft thread where people who are clinically underweight can claim it’s all very fine.

Aluna · 30/12/2025 10:09

cinquanta · 29/12/2025 22:03

Yet the WHO and the health authorities of all the countries where those women live maintain that 18.5 is the lowest end of the healthy range.

Why?

Because, as has been explained, BMI are simply guidelines and don’t account for build and muscle mass.

There will be many men and women like my brother with big frames, a lot of muscle mass, little fat, who register in the unhealthy range.

BringBackCatsEyes · 30/12/2025 11:00

Aluna · 30/12/2025 10:09

Because, as has been explained, BMI are simply guidelines and don’t account for build and muscle mass.

There will be many men and women like my brother with big frames, a lot of muscle mass, little fat, who register in the unhealthy range.

That's why the range is so wide. There are outliers like professional rugby players, Olympic weight lifters and gymnasts.This is indeed a limitation of BMI, but those people will absolutely be aware of this.

It is one metric and one that is very easy to assess and for most people it is helpful.

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