Weight loss

Having been ill for a week, I stumbled out the house for a 6km medicinal run. Cold and nasty day, but I was enjoying myself too much so continued on for another 2km. I was interested to see if I have lost any weight after not eating very much for the last week.

I weighed myself before the run and I was down to a respectable 80.2kg. Good lost the weight from Christmas.

After the run (in the cold, so not much sweating)  I had lost a shade more than half a kg

BUT an hour later, an egg butty and an enormous mug of tea, weight had gone down to 78.7 That is 1.5kg in 2.5 hours. Where has the weight gone!