Hi, sorry if this is a bit long.
My daughter is 15 and, a few years ago, went from eating very healthily and being a healthy weight as a 10/11 year old to gaining quite a lot of weight when starting secondary school. A lot of this was due to having the freedom of buying a lot of unhealthy foods from the school canteen, not running around any more at break as she had in primary school and stopping swimming as she wasn't enjoying it. There was also the fact that puberty had hit with a vengeance so, although she was conscious of her weight, she was no longer sure as to what her healthy body would look like, iykwim.
About two years ago, after she kept getting upset about her weight, her dad and I had tried to approach this gently and she did change her eating habits and did lose some weight and she bwas really happy about that.
Back in March, she was weighed at the doctor's when getting checked for asthma, she was put at 68 kg at 5'4" which was quite a lot more than I would have thought and she was quite upset about this. I thought about what she eats and it is, frankly, a lot less than is recommended for a teenager.
During the week, she usually had Weetabix for breakfast, brought a salad for lunch and didn't have anything from the school canteen. Tea is healthy enough stuff such as salmon and veg, Quorn sausage and veg, spag bol, Spanish omelette, vegetable soup with toast etc. Neither of us eat meat and she doesn't like cheese so there's very little fast food in her diet. At weekends the food may not be quite so healthy but still pretty good.
We reckoned that lack of exercise (she has a very short walk to school and wasn't interested in sports clubs. Did do trampolining once a week and we played squash at weekends but this doesn't really amount to much) may have been an issue and talked about sports she may like to do.
She pulled a muscle in her back doing Duke of Edinburgh in may (rucksack not adjusted properly) and was in quite a lot of pain for almost two months. Walking was painful and trampolining and squash were out of the question).
At beginning of the summer holidays she went on a big healthy eating kick and also started running, which was great. She's kept that up ever since and is now running about 3 miles most mornings before school and is eating what I'm starting to think is quite worryingly little (but has been slightly more this week as she's had mock exams and I insisted that having requisite energy superceded the healthy eating).
She's visibly lost a lot of weight in the last few months, it's noticeable, she's really happy about it and probably the healthiest she's ever been. She weighed herself this morning for the first time since the doctor's and is still exactly 68kg. She is really, really upset.
I'm just not quite sure how to help her. She's sensible and knows that she's never going to be tiny. Like me, she's got quite a big frame for a woman despite being average ish height, as well as having quite a large bust which doesn't go down with weight loss (I've been trying since I was a teenager) but this came as a bit of a surprise.
I'm not really sure what to say to her or if I'm delusional about what a healthy size is.
Basically- does anyone have any advice as to how to treat this. I hate seeing her this upset and I'm just not sure what to say about this. Thanks.