• Upgrades have been completed! Including conversations, 😁😎🏀⚾⚽ Emojis and more.. Read more

What's the difference? JUDDD/DODO/5:2 -24 or 36 hrs

S: 281.1lb C: 241.4lb G: 218.3lb BMI: 30.2 Loss: 39.7lb(14.12%)
Good question and I hope more will answer.
This is how I have perceived it. Almost all is the same principle, you faster 2 days out of the 7 in a week but they should not follow each other. You can call it JUDDD/DODO/5:2.
The hours is about how long time it should take in between the meals at a faster day. Personally I go for the 36hrs as I wish to empty my glucogen levels in my muscles and trick my metabolism to burn fat instead. So HOW??
I have the "Last supper" (dramatic - isn't it) the evening before a faster day at 8 PM and wait until 2 PM the following day to have my 500 cal mean. Then I don't eat anything until breakfast the next morning. Same procedure the next day.
I hope this shed some light
S: 11st13lb C: 11st1lb G: 9st13lb BMI: 24.6 Loss: 0st12lb(7.19%)
JUDDD is "Johnsons Up Day Down Day Diet- Also known as alternate day fasting- you fast (consume fewer than 500cals) every other day.

5:2 you fast 2 days out of 7.

DODO I have no idea!

Some people, especially those on JUDDD, fast for 24hrs- e.g 2pm one day to 2pm the other, that way they eat everyday. It works for some people and works best on JUDDD rather than 5:2. 5:2 works best on a 36hr fast e.g fasting from 10pm on a feast day to 8am on your next feast day, consuming only 500cals in between. I hope this helps?


2016 Fitness/Fatness Status Changes
S: 16st0lb C: 14st9lb G: 10st11lb BMI: 34.1 Loss: 1st5lb(8.48%)
Sod the science - that will work whichever way you choose. Just have a shot at all of them and see which one suits you.

I started JUDDDing and, months before Dr Moseley, had settled on what has now become 5:2 as my own variation. JUDDD is older than most but they are all variations on a theme. None is more right than any other. None works better, costs more/less, has more/less credibility.

All are variations on Intermittent Fasting and the only real rule is try to have 24 hours with very, very few kcals at least twice a week. That's it!

All you have to do now is work out which pattern suits you and your lifestyle best.

If it helps, I have Monday and Thursday as Down Days. So I will eat at about 6-7pm on Sunday and then won't eat more than 500kcals until about 10 - Noon on Tuesday. So I manage 36 - 40 hours with 500kcals. There was no science behind that choice, it just fits and is doable for me.

Good luck :)


Full Member
S: 281.1lb C: 241.4lb G: 218.3lb BMI: 30.2 Loss: 39.7lb(14.12%)
Hi 2012Willdoit, I couldn't agree with you more on finding your own way to succeed. Have you also tried 3:4 scheme?


Gold Member
S: 16st1lb C: 13st11lb G: 11st7lb BMI: 29.3 Loss: 2st4lb(14.22%)
The only difference is the number of fast days in the week. JUDDD is 3, 5:2 id 2, DODO is presumably also 3. Find which one works best for you and your lifestyle and go for it!


Full Member
S: 281.1lb C: 241.4lb G: 218.3lb BMI: 30.2 Loss: 39.7lb(14.12%)
Hmm ... I wasn't sure about that difference. Then JUDDD is not what I do. Thanks for clarify
I agree, just give it a go and go with whichever either works best for you and your lifestyle. I've only ever tried JUDDDD. I had considered trying 5:2, I liked the thought of just two 'down days' but just didn't think I'd be able to lose on it so I stayed with doing alternate days.


Full Member
S: 281.1lb C: 241.4lb G: 218.3lb BMI: 30.2 Loss: 39.7lb(14.12%)
It sounds hard to fast three days in a week, might try it though if I don't move my weight downward.

Similar threads