P90x First Day Video For Free I Haven't Lost Any Weight!?

I haven't lost any weight!? - p90x first day video for free

I did Weight Watchers for 7 days, and the development of each day (running, walking uphill, ABS, etc.) has become one of the P90X videos the other day and I lost weight. I Wog me the first day I got my scale and weighed 139, two days later was reduced to 137, now I'm back to 138.8. Why am I not losing weight?