It's a diet that in very simple terms, involves eating normally for 5 days a week and fasting for 2 (They don't have to be consecutive).
Michael Mosley was the first prominent person to promote it in the UK. He did a Horizon show on diets and basically endorsed 5:2.
You can read more about it...
Well done! Personally I'm not a fan of 5:2 as it is a "diet" rather than a lifestyle, although I'd be interested to see if people who use it to lose weight stick with it once they've hit their target.
You're completely right that it's about consistency. The reason I suggest before you go to...
Typically throughout a day your weight can fluctuate by 1-2kg, sometimes a bit more. Sweat, food, drink, going to the loo etc will all affect it.
For example, over a 2 hour period you drink a litre of water and you don't go the loo................... That will equal roughly 1kg extra.
If you...