
Your weight flactuates by 2.2lbs during a day on average. Weighing yourself every day is not reccommended by experts (even if the wii fit says so!) The Wii fit isn't great for loosing weight. Most of the exercises are to tone muscles. We have had one two weeks now and my weight chart is going up and down (although my fitness age has come from 35 to 20!)
I use the wii fit as abit of fun muscle toning while going to the gym aswell (except illness for two weeks has stopped me going to the gym)
But yes you could have put on 5 lbs in two day. what sort of foods have you eaten? have you snaked much, did you weigh yourself at different times, before/after meals? So many factors to consider!
I went up 5 lbs last weekend but I put that down to excess water retention by my body! (I can use that excuse!, the men can't ;) )
I have found the scales within the wii fit to be very accurate and match our bathroom scales.