Didn't weigh myself today. Second to last Y10X class today. I got dizzy again from so much jumping up, then immediately getting down for pushups/planks/situps, then back up for more jumping. stopped for a bit again to snap out of it. I noticed while leaning against the wall in a "seated position" (like this, minus weights)
that I can go much lower than I did in the first class... progress!
As far as how many calories I burn per workout, I have my heart rate monitor calibered (weight, resting heart rate, etc). There are 2 buttons to push to get a heart rate and I check it frequently throughout class. Its hard to say how accurate it is, but I tend to stick with instructors that work me out so hard I'm outta breath or if I feel a burn in my arms and legs.
Tomorrow is my day off, but I'll probably end up doing something light - walk with Ant and the kiddos or some minor weights. I really need to work on my triceps.