So, yesterday wasn’t quite so hard as teh day before, I think I ate a little more than the 500kcal, but I still managed to get down to 124.8kg which is down considerably from sunday when I weighed in at my heaviest of 129.2kg … about 4kg down in all.

Now, obviously I can’t expect to lose 4kg in 4 days for every day of this diet, though that would be nice. 1kg a day would mean I could be finished in about 2 months!

I’m actually aiming for about 1-2kg a week.

Lunch today will be chicken curry with naan bread probably, but I need to calculate the calories a bit - I need to limit myself to about 1000 now, which should be a deficit of about 1000-1200 kcals a day.

According to the hackers diet “each pound gained or lost is equivalent to 3500 calories excess, stored as fat, or deficit, burned from fat by the rubber bag”. If 1kg = 2.2lbs, that means that 1Kg = 2.2 x 3500 = 7700kcal. So, to lose 1KG in a week, I need to have a deficit of 7700kcal in that week.

The hackers diet says that the ideal weight for a man of around 6′1″ is around 180lbs for a man of medium build - looking at the top end of the range (trying to be realistic here). 180lbs is about 82kg.

The low end of the calorie scale in the hackers diet shows such a person eating around 2200kcal/day. If I eat 1200kcal a day, then my defecit will be about 1000kcal/day, in a week it will be about 7000kcal and that means I’ll lose just under 1Kg a week at that rate. Obviously the more I’m willing to forgo food, the quicker I’ll lose weight. Eating 500kcal a day should be around 1.5kg a week? It seems unreasonable to expect truly rapid weight loss that I’ve experienced at the first three days - it has to stabilise somewhere around the 1kg/week mark - to eat 500kcal a day for the next 6 months would be impossible, and would not give me much extra benefit weight losing wise.

So, I’ll work on eating around 1000kcal a day, with a defecit of 1200/day, for about 8400/week defecit which equals to a bit over 1Kg/week. At that rate, we’re looking at a weight of around 80kg in about a year. Which would be lovely, not to have to haul around this extra 40-50Kg everywhere.