Naked at dawn?

Yeah! 13 st 2 lb! That means I'm 2lb lighter than I was a week ago! Go Jemima!

So:

Q1.Have I lost 2lb of fat or water?

Q2.Are my scales that accurate?

Q3.Is it because I've done all this exercise or is it just due to random fluctuations in the space-time continuum?

A1.Well, as far as I know it is easier to lose water than fat and water actually weighs as much as fat. A cup of tea or two could undo all the hard work.

A2.Um, no, they aren't all that accurate. If I stand on them twice in a row, they weigh me heavier the second time. If I stand on them repeatedly I can put on half a stone in five minutes.

A3.Who knows? We weigh less in the morning than we do at night (no, I don't know where the weight goes during the dark hours). Unless you weigh yourself wearing the same clothes, and at the same time of day, then you really can't be all that sure that weight changes are real.

So, naked at dawn, then?