She aims to put on a stone and a half in a year.

Each week Lizzie posts part of her diary describing how she is finding the challenge.

To sponsor Lizzie visit www.justgiving.com/lizziegrimaldi.

Diary entry: 4th January:

God I feel ghastly. I hope I'm not coming down with something - that would be just my luck. Its strange, I haven't been ill (as in having a cold or flu) for years. It is almost as though my immune system has been suppressed by this semi-starvation - somewhat analogous to the study which observed that viral infections were attenuated and T-cell mediated responses lowered in protein-starved mice. So perhaps it is a positive thing and a direct result of my improved nutritional status. I do feel sick though, and I've got a stinking headache. And a stye. But apart from that Mrs Lincoln...

Had a long conversation with Christa about her piece in The Telegraph. I think it sounds absolutely fine and that she is going is put the right slant on it. And I also think she is right in saying that the weblog needs an injection of oomph - seeing as no-one seems to be responding to Hannah's appeal for comments (hint hint)

Diary entry: 3rd January:

I must admit I'm a bit disappointed. I've only managed to put on 0.4kg. A case of E for effort. Could do better. But at lease it is a start. I just wish it had been a bit more. What I mustn't do is let myself off the hook - it would be too easy to just lose it again.


Weigh-in results and sponsorship update
...And the results of this week's weigh-in are...

Diary entry: 2nd January:

This is going to be hard. How do I stick to the routine now that I am on my own? When all my instincts are to cut down. I am simply not hungry and I want to feel hungry again. I suppose I just have to keep doing it and perhaps the hunger will return again. If I stick to proper mealtimes and eat proper meals, maybe I'll get used to it and regain an appetite – not just for food but for living too.

Well I took my time, but I did it. I was determined to sit down and make myself have exactly the same as I would have done had Barry been here and I did. I need to establish a routine however forced it may seem at first. Gradually it will become a habit and who knows, I may start to enjoy it. Cheese and oatcakes? Yum yum yum.

What I'm not looking forward to is being weighed tomorrow. I know I have to but it is going to be incredibly hard not to panic when I get confirmation of this weight gain. I've got to face it sometimes and reassure myself that it is fine. Just because the scales say something does not alter how I feel. And I do feel better physically. Well sometimes anyway. I didn't like getting light-headed when we went for a walk the other day, and my hair and skin look pretty crap. But generally I think there is an improvement, and my mood is a bit more stable.

Diary entry: 1st January:

Well Happy New Year. Happy New Lizzie? I wonder what this year will bring. Can it be any worse than last year? Typical New Year's Eve nightmare – we both hate it anyway so it's not surprising. Why am I not given any concessions for being unwell? I know he is sick of it, but that doesn't make it suddenly evaporate. We went on a walk and I got tired. Very tired. Just getting through the day is sometimes a physical struggle. But I'm not allowed to play the anorexia card. Especially if it rears its ugly head at an inconvenient time. Or heaven forbid, at a mealtime.

It was lovely to have the Shergolds back and a well-needed injection of normality and stability. Christmas is such an artificial situation it's not surprising people come to blows – and with the added pressure of an eating disorder when there is a surfeit of food and drink, I guess it's surprising I am still in one piece.

Sometimes I have to give myself a reality check. And I realise that it isn't always me.

But I'm prepared to change, and I am changing. It's not surprising that I'm going to have weird mood swings to accompany the weight gain. Read the literature, it's text book stuff. I'm coping with the fat thighs, the stuffed-ness, the hamster cheeks. Give myself some leeway and acknowledge it.

Nothing is going to change unless I do.

I'm finding this whole thing rather uncomfortable. Not just physically (although it is – I feel like the Pilsbury dough man. Just raisins pressed into uncooked dough. Hot.) but emotionally too. This diary wasn't intended to be an outlet for my self pity but sometimes it has to be. I don't want it to be read I just need to get it out. Reawakening of feelings. I've just got to go with it and try. See it as an experiment. I don't like it. I don't like eating so much. I don't like enjoying myself. Yet. But I will. And maybe we can go back to how we were. I try so hard but it is never enough. I love him so much but that's never enough either. When is it ever going to be enough?