Meet the Other Phone. A phone that grows with your child.

Meet the Other Phone.
A phone that grows with your child.

Buy now

Please or to access all these features

Fasting / 5:2 diet

Talk about intermittent fasting and 5:2, including what’s worked for others. Mumsnet hasn't checked the qualifications of anyone posting here. You may wish to speak to a medical professional before starting any diet.

5:2 Diet thread! Number 17- ready for Spring! Any day now!

999 replies

GreenEggsAndNichts · 08/04/2013 13:21

The continuing thread for those of us following either the 5:2 diet or the alternate-day fasting diet.

The 5:2 diet was featured on Horizon in August 2012, and essentially requires you to fast for 2 non-consecutive days per week. The other 5 days, you can eat what you like, or approximately your TDEE (see explanation below). Alternate-day fasting is just how it sounds; you fast every other day. By "fasting", we mean that we keep our calorie consumption very low, around 500 calories on average for a woman, 600 for a man, on those days.

You'll find on these threads we use a number of acronyms. If you're new to the threads, or Mumsnet in general, they might not make much sense.

WOE/WOL = Way Of Eating/Way Of Life. We use this term instead of "diet" as many of us see this as something to do in the long term.

MFP = My Fitness Pal, a website many use for keeping track of the number of calories they're eating.

TDEE = Total Daily Energy Expenditure, quantifies the number of calories you burn in a day. This measure is best estimated by scaling your Basal Metabolic Rate to your level of activity. TDEE is critical in tailoring your nutrition plan to desired fitness goals. Here is a link to a calculator to help you figure out how many calories you should be eating in a day.

ADF = Alternate-day Fasting, as it says on the tin, fasting every other day rather than 5:2.

Michael Mosley has recently unveiled a new website to accompany his new book on the subject. Please go check them out, as he's the whole reason most of us are here!

I know a number of people lurk on this thread, as this is currently quite popular. Please just jump in and post if you're new- you'll find a lot of support here. :)

Here is a list of links to get you started with this way of eating. Please let us know if you find a new article or some other information online:

First things first, here are links to some of our previous threads: most recent one before that another one!

Another thread which breadandwine has started is a good resource for some of the links and tips that get lost in these big threads. In addition to sharing links, we try to condense some of our top tips for fasting there. Keep in mind, we all do this differently, so these are just tips, not rules. This might be a good place to catch up with us if you're feeling a bit lost!

frenchfancy has a recipe thread over here, please post any low-calorie recipes there so they don't get lost in these bigger threads!

If you've been at this a while and are moving on to maintaining your goal weight, there is a thread here to discuss that.

Here is the link to the BBC article regarding Michael Mosley's findings, which was featured on Horizon.

There's a link to the aforementioned Horizon programme here.

A blog post here gives some of the scientific explanation for why this way of eating helps you to not only lose weight, but improve your all-around health.

A Telegraph article which comments on the diet and gives a brief overview by Dr Mosley himself, very informative if you're just starting.

A study discussed here gives commentary specifically addressing the effect of this diet on obese people (both men and women), with regard to both health and weight loss. ("After 8 weeks of treatment, participants had an average 12.5 lbs reduction in body weight and a 4 cm decrease in waist circumference. Total fat mass declined by about 12 lbs while lean body mass remained relatively constant.) it also mentions "Plasma adiponectin, a protein hormone that is elevated in obesity and associated with heart disease, dropped by 30%. As did LDL cholesterol (25%) and triglycerides (32%).")

Something to consider if you are currently your ideal BMI: this appears to suggest the benefits for women at a lower BMI might not be seeing the same health benefits that are found on men at their ideal BMI.

A BIG THANK YOU to all who have been contributing, btw. Most of us are learning this way of eating as we go along. All of the links above have been posted by others in our previous threads, and they've been very helpful. Sorry if I haven't given credit where it's due, but it was just enough of a job getting all the links re-copied and back into one post.

Come join us, and tell us about your experiences with this diet!

OP posts:
swallowedAfly · 17/04/2013 07:58

or is that its? aargh grammar attack

postmanpatscat · 17/04/2013 08:16

Morning all

Hardly have time to catch up with you all now I'm back at work and evenings are taken up with gym/family/more work!

Second fast of the week for me, I last ate before 5pm yesterday so I'm aiming for 24 hours without food (20 hours may be enough, but I have nothing at work to eat so 24 it will have to be!)

Well done sausages and saf, nice to hear that 10-something seems to be sticking.

I'm 100g over my lowest weight so I'm hoping for a new low tomorrow or Friday - fingers crossed.

Good luck no sugar/sweet treats people, you're doing great!

akarucker · 17/04/2013 08:30

saf looks like you're in the 10's to stay (well, until the 9's!). Well done.

BsshBossh · 17/04/2013 08:32

Breadandwine It did feel weird, not cooking an evening meal - I almost got withdrawal symptoms! Exactly my experience - wasn't physically hungry at all but missed the habit of preparing and sitting down to an evening meal. But habits can be changed (eg I no longer snack or graze on fasting days) so roll on Thursday!

Raifsmum · 17/04/2013 08:39

Hi all,

I am a newbie. I am only on my second fast day ( my first was sunday). I lost most of my baby weight through exercise but I have a stubborn half stone that will mot budge. I just wanted to ask how long you guys thimk it will be before I see a difference and what I can do to hey rid of an afternoon headaches that I always have on a fast day. 9 st 4 and hoping to get to 8st 8 which is right for my height.

Wish me luck :)

Raifsmum · 17/04/2013 08:40

Oooops awful typos.... sorry :/

SlipperyNipple · 17/04/2013 08:56

Melodyangel - so you are not very over weight. And you may have lost more than 5 pounds because in the first month you may have lost 4 pounds at least? Couldn't bold your name as I couldn't see a star on the iPad key board.

I have been thinking that pre 5:2 I was maintaining at around 16 stone and reducing very slowly so once I started 5:2 I would lose for a while without calorie counting on other days. However at some point I'm going to have to reduce my eating days or I'll just stall. Has that happened naturally for people?

I really don't want to calorie count on feed days. It makes me feel like I am living behind bars.

SlipperyNipple · 17/04/2013 08:58

Well done aka tucker. I think if you could kick the sugar habit you could probably do 5:2. I can't see how most people would live long term with ADF.

AliceinSlumberland · 17/04/2013 09:08

Hi guys, hoping I can join in. Have been using MFP on and off to calorie count but just can't sustain it as me and oh love a meal out here and there, or cooking up a roast. Not always unhealthy but generally pushes me over the 1200 call MFP allows me and makes me feel full of guilt and not enjoy the meal at all!

I'm going to do 5:2 with fasts on Monday and Thursday plans permitting of course. I'm currently about 12stone 4lbs although not totally sure as our scales aren't electric. Would like to loose atleast a stone to be a comfy size 10. I'm 5ft9 so pushing the too high end of bmi. Also stepping up the exercise as I'm an exercise phobe. Just done first stage of c25k and hoping to walk for an hour on as many of the non running days as poss.

On tomorrow's fast hoping to go as long as possible and then have some fruit followed by a jacket potato with beans for tea. Got lots of Uni work to do which will be hard as I reward myself with food for getting work done. Need to find other rewards eg get a magazine to read, watch a tv programme as a break etc.

Great to see lots of steady weightloss, really inspiring!

BetsyVanBell · 17/04/2013 09:14

4th day of no sugar and aside from a cold-related sore throat I feel pretty good. Sugar makes me wake up grumpy so despite illness rubbishness I'm surprisingly chipper. Also, I am still maintaining my post-fast day weight - my last fast was Sunday so I am hugely pleased with that as I'm not fasting till tomorrow.

aka, saf good luck with the no sugar eat day today, aren't we doing well!!!

Raifsmum Well done on getting a fast under your belt already - that's the hardest bit! You haven't given us your height but you sound quite slim already so it may take a bit longer to lose those few pounds. Most people seem to average 1lb a week but with less to lose it may be more like half a pound a week. Also, when I say average that's because some people lose nothing for (eg) 3 weeks and then lose 3 lbs or some lose a whole bunch straight away and then nothing for ages! But most people have success as long as they're not overdoing it on feed days.

slippery I agree, counting calories absolutely sucks but it might be worth checking that you are eating somewhere around your TDEE for a couple of weeks and don't forget that your TDEE reduces as you lose weight so the slimmer you get the less you should be eating. (something I need to remember!)

peplum doffs top hat Thangewvermuch, I'm here all week waggles eyebrows. Oh and the calcium & magnesium tip seems to have paid off, calves are ok so thanks again for that Grin.

BetsyVanBell · 17/04/2013 09:18

Alice Welcome! Have you calculated your TDEE? (link in the OP)? That 1200 on MFP will need rejigging as you need to eat more on eat days if you're losing 1400 calories over a week by doing fast days. I think there's a weekly tab or something on MFP which might help you? I say that as people don't have a huge success combining fasting with daily calorie restriction - there seems to need to be a contrast between feed and fast days! You may already know all this of course... Smile

BetsyVanBell · 17/04/2013 09:24

saf Sunshine is the cure for so many ills. My skin is not glowing either, zit attack on my nose this morning, bleugh. I blame my new cold! Wow it's only been like 3 weeks since the last one, oh and the one before that etc etc.... long winter = Angry.

AliceinSlumberland · 17/04/2013 09:33

Betsy - right that's good to know as 1200 was so so hard! If I put in no exercise it says my tdee is just under 2000 and bmr of 1631. If I put in that I do a little exercise the tdee is 2243 which seems quite high? I am doing c25k so will be doing some exercise but not sure whether to go off the lower tdee so I loose more, but then do I risk loosing nothing because I'm not eating enough on eat days? Sorry for all the questions!

BetsyVanBell · 17/04/2013 09:57

Alice Why don't you try aiming for 2000 and if 1800 feels enough stop there, but then you know you have an allowance if you want to eat (& drink) more at weekends. Your bmr of 1631 is how much your body needs just to lie around in bed all day which probably explains why 1200 was so difficult! I would recommend boosting up your calories with nuts & seeds, avocados and bananas rather than with crisps, cake and chocolate (it'll help your running too!) Obviously you can have crisps, cake and chocolate too but make it a treat sometimes if you see what I mean, rather than daily - it's tempting just to go nuts on 'treats' when you've been restricted.

Oh and just tell me to shut up if this sounds utterly patronising!

I like c25k - I worked through most of it last spring having never done any sort of running before. Stopped running during the summer with occasional runs here and there (less than once a month) and have started back up recently and find I can easily run 3k without it feeling too difficult at all! In my unscientific observation, it seems that once you've put in the groundwork your muscles remember what to do even if you stop for ages.

AliceinSlumberland · 17/04/2013 10:06

Right brill no not patronising at all, great advice! I'm sure 1800 will feel like a feast compared to 1200! Then that gives me a little extra to play with for meals out or treats at the weekend.

virginposter · 17/04/2013 10:11

slippery I too use the ipad. You will find the star after you press the numbers button then the button with #+= and the star is on the top line Smile along with the square brackets for the emoticons Grin

SanityClause · 17/04/2013 10:24

Can I join?

I had my first fast day yesterday. I found it much easier than I thought; I think it was the fact that it's just one day made it quite bearable.

I downloaded a calorie counting app on the iPad, which was very helpful. Is it necessary to count calories on the non-fast days? I can see that some people do. I do eat fairly healthily, though.

Dotty342kids · 17/04/2013 10:52

Sanityclause - welcome to the gang! No, it's not necessary to count calories on fast days at all. Some of us do, because over the years we've lost sight of what a "normal" daily amount of food is and using something like MFP is an excellent way of really seeing how many calories are in what we eat in a normal day. For some people it's a rude awakening to the fact that they've been overeating by some margin! For others, it's reassurance that what they normally eat is ok.
Well done on your first fast, it's really not as hard as you'd anticipate is it? Smile
I'm doing mini fasts today and tomorrow after a spectacularly bad day yesterday, and a stall of about 3-4 weeks on the scales.
Mini fast = no cals at all till teatime but then not worrying too much about sticking to the 500. So today, I'm having home made chicken nuggets and veg with the kids, and tomorrow a small portion of chilli tomato pasta.

mehefin · 17/04/2013 11:03

Hi peplum The first 4 hours and last 3 hours of my shifts are busy and the 3 hours in the middle can be quiet or relentless you just never know!

I always used to take a fairly healthy sandwich and a yoghurt but it was biscuits all night long especially Mr K's viennese whirls, then if there was left over jelly in the fridge I couldn't resist and then the dreaded sliced white bread to make into toast !

I used to feel I needed a constant supply of energy but now I find I function better if I am a bit hungry but I'm not sure I could do what you do and not eat while at work - maybe one day.

So good to get all the encouragement from this thread and nice to share this WOE in real life too

plecofjustice · 17/04/2013 11:57

Was wondering if I can get some opinions. for info, I've been fasting (5:2) since last September

Don't laugh, but I'm not sure I'm not undereating, and having explained the number-crunching of BMR/TDEE to a few people, I'm not sure I'm not going awry myself.

My BMR is 1600
My TDEE (sedentary) is 1923
So I fast Mondays and Wednesdays (500 cals)
Tuesdays and Thursdays, I eat to MfP recommended (1590 cals)
Fridays I eat around 1700-2000 cals
Sat and Sun I used to eat around 2500 each, but now I think that's nearer 2000, maybe less
I try and exercise 3x per week - hot yoga, swimming and general resistance/cardio in the gym

I've hit a weight blip. I'm hungry most of the time - not when fasting, but on non-fasting days I often eat my mfp cal allowance and go to bed feeling hungry, which is a bit rubbish if I'm waking up into a fast!

I've always had a slow loss with this diet - only around 1-2 lb per week and have lost a stone since September, which isn't a lot compared to others doing this, but is pretty reflective of my body. I don't lose weight easily, my mum is the same.

I've cut down on carbs a lot, I find I just don't enjoy them like I used to.

I'm just not sure whether to up my calorie allowance on my feed days or look at finding some carbs I like to bulk up my diet.

If I was advising anyone else, I'd say eat more, it's just easier said than done! Any suggestions??

ELR · 17/04/2013 12:27

plec I would eat your tdee calories especially on the days you exercise and at weekends I would eat no more than say 2200. The deficit of the fasting and exercise should result in a loss. Life's too short to go to bed hungry every night!

SlipperyNipple · 17/04/2013 12:35

virginposter thank you so much. That was really annoying me.

pleco if it was just the numbers that were under and you felt ok then that would be ok....but your body is telling you it is not happy. Up your calories. Have a few days a week where you feel comfortable going to bed. Well that's what I think.

BumBiscuits · 17/04/2013 12:35

Hi, joining again after having half of the Easter hols off.

I had a failed fast on Monday, and did a successful fast yesterday. I've not had anything other than coffee today so far toda. Would it be okay to do consecutive fasts? Just this week.

I usually do Mondays and Wednesdays. Thursday is the start of my weekend, so I'd rather not fast then.

I'm a 5:2er rather than a 4:3er.

Wishihadabs · 17/04/2013 12:46

Hello,
Haven't posted for ages, but been lurking and continuing with 5:2. Been doing it 5 weeks total weight loss 6lbs. Amazed how much my appetite has reduced on non fast days. I do night shifts too and do 10am-10am fast with one 300 cal meal in the middle, lots of black coffee and a couple of pieces of fruit. Seems to work for me.

Wishihadabs · 17/04/2013 12:47

The other fast of the week is midnight to midnight.

Swipe left for the next trending thread