First of all it sounds like you are scale obsessing a bit. I don't know if that is particularly good. However other than that tangent...
1. The scale. Scales are not always accurate. Did you change where you weighed in? Home scales can be especially picky, a change on the floor (if there is a dip) can flip a
pound here or there. Or a kick can uncalibrate it. If it is a
gym scale who knows what
fat girl decided to do jumping jacks on it.
2. You had an especially good workout and your
body hasn't had a chance to replace it's glycogen stores. Glycogen, your main source of initial
energy in a workout, binds to water and thus is a significant part of your water weight at any given time. If you deplete those stores you can lose 4-5
pounds easily.
Just sounds like your
body was being really efficient in its burning of your glycogen today. There are many hormonal possibilities for this. Don't sweat it.
Michael
