I started P90x a week and a half ago. I weigh myself every other day, and write down an 'official' weigh in weight once a week...Friday. I weigh first thing in the morning right after I go to the bathroom.
First week, I lost 5 pounds and 3"
I weighed myself Monday, and I gained 4 pounds back
So this morning I weighed myself again...and lost 2 pounds (compared to Monday's weight). How many of you notice the scale fluctuating? When can I really say 'I lost that weight' and it 'counts'? Or should I be concentrating on measurements and inches lost?

Trust me, after a big weight training session I almost always see an extra pound on the scale that goes away the next day.