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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 thread 102: Faster than a speeding bullet!

989 replies

harriethoyle · 22/06/2024 08:08

Welcome to the continuing thread for those following 5:2 or other forms of IF (Intermittent Fasting) such as 4:3, ADF, etc.

Basically it is 2 very low cal days ("fasts") per week - which need not be consecutive - and eat "normally" to maintain on the other 5 days.

For those who have dieted or maybe overeaten for years, eating "normally"
means roughly the number of calories your body needs to maintain - NOT reduce - its weight (see TDEE calculator below).

IMPORTANT
If you have had past diagnosed Eating Disorders or serious MH problems you should NOT do 5:2 or any other kind of fasting

JARGON alert

16:8 is a different type of fasting, which can be combined with 5:2.
Daily zero-cal fast for 16 hours and eat within an 8 hour window. To lose weight, this needs a weekly calorie deficit as well

b2b (optional) back-to-back / consecutive fast days, each with an increased allowance of 650 calories instead of 500

BMI (Body Mass Index) healthy range is 18.5 - 24.9 for Caucasians. Upper limit may be 22 for some of Asian origin.

FD = single Fast Day: aim for 500 calories (600 for men or 25% TDEE whichever is higher) or 1000 cals for BF
No alcohol or junk on FDs
Even if you exercise strenuously, do NOT increase FD cals to allow for exercise

MFP = My Fitness Pal, a useful App or website to track food & drink calories

miniFD = MiniFD, 850-1000 calories, no alcohol or junk

NFD = Non-Fast Day, averages around TDEE

NSV / LSV = Non Scale Victory / LifeStyle (change) Victory, e.g. compliment, smaller waist, clothes size

SV = Scale Victory

TDEE = Total Daily Energy Expenditure, the average number of calories you burn in a day, is calculated from your current weight, height, age, activity level.
Aim to average about this for NFDs.

WOE / WOL = Way Of Eating / Way Of Life. We say this instead of "diet", to emphasise that we must make a permanent change in how we eat, to maintain our new healthy weight long term.

Jump in and say hello!!

OP posts:
eekwhatnow · 17/03/2025 07:26

Morning all, feel like I just lost my mojo last week. FDs were ok but rest was awful, reflected in no weight loss.
Really hope I can get back on track this week. Busy week and worried about my DD's health so actually being able to stay in control of something would help me feel better too.
FD today. Miso and tuna salad for lunch. Mushroom omelette for supper.
Good luck everyone.

Darker · 17/03/2025 07:59

Well, my Monday weigh-in is 4 oz over the ‘stone’ which is not at all surprising. But I had a great week!

harriethoyle · 17/03/2025 09:13

Morning all, I am afraid I got caught up in cup final fever yesterday and drank far too much wine and had a kebab 😂So I've undone all my good work and I'm slightly up on last Monday! However, it was a once in 70 years so probably dont need to worry too much.

I'm struggling a bit to get good fasts in on Monday/Tuesday because those are my PT days - so today I am going for a proper b2b day one (682 cals planned) to see how it is. If it's OK I will repeat tomorrow and if not, I will have to go back to the drawing board. I just really like fasting at the beginning of the week because a) it gets it out of the way b) it gets rid of the weekend weight quickly and c) it means I've got time for a third if I've REALLY overindulged. So I would like to try and work it in somehow.

I also had a bit of an epiphany last night - DH and I have been out for a couple of meals recently and I've just gone along with everyone else and ordered a starter when I didn't really want or need one. So that's definitely a little change I can make to limit weekend damage if a meal out is on the agenda...

OP posts:
Darker · 17/03/2025 09:28

That’s great to notice that, @harriethoyle . It’s an easy win to just not have a starter. A few small changes can make a big difference.

aberjenagain · 17/03/2025 09:38

Morning all, joining the Monday FD crew. Miso for lunch and chicken salad for tea, need to check calories but might chuck some falafel in too for a bit more protein and fibre.

aberjenagain · 17/03/2025 19:35

All done on 497. Change of plan to chicken stir fry for tea - elder DD, year 7, has started doing food tech at school and was desperate to cook for us. Definitely not looking that gift horse in the mouth!

harriethoyle · 17/03/2025 19:38

Kitchen closing on 712 here and a gym session completed so I’m happy enough with that. Planned cals for tomorrow 682 so if I can meet that I’d be happy enough. We’ll see!

OP posts:
Darker · 17/03/2025 19:58

I had a snack-cident with some Jamaican ginger loaf (it was cold!) but otherwise good here.

harriethoyle · 17/03/2025 20:34

Darker · 17/03/2025 19:58

I had a snack-cident with some Jamaican ginger loaf (it was cold!) but otherwise good here.

I LOVE Jamaican ginger cake. It’s also extremely good with a slice of Wensleydale cheese 🤤

OP posts:
Darker · 17/03/2025 20:40

I baked it myself and thought it would look weird if I didn’t eat any of it. But one tiny slice turned into two slices… 😳

[adds Wensleydale to shopping list]

OP posts:
harriethoyle · 17/03/2025 20:45

@Darker i cannot have home baked goods in the house, or sweet things. I’d say I have a more savoury tooth generally but once I get started, I get the taste for sugar.., I took my birthday treats into work and fed them to my colleagues 🤣

OP posts:
OohMrDarcy · 17/03/2025 21:03

Kitchen closed on 680 today. Happy with that. Hopefully filled up enough that I feel able to b2b tomorrow.

Also ended up doing 3 separate walks which is a good feeling on a FD!

eekwhatnow · 17/03/2025 21:40

Kitchen closed on 585. Felt like a more planned sensible day than recently so I'm pleased. Although lying in bed literally salivating at the mention of Jamaican Ginger Bread. Yum!

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