I got a new watch for Xmas and it monitors my heart rate and can then tell me how many calories I have burnt .
For my Thursday 5/1/12 Zumba(1hr)and hula hoop (45)classes I had an average heart rate of 132 and a maximum heart rate of 169 I also burnt 837 calories!
I think I did a good job ! :0)
On 2/1/12 during pt session I worked for 27 mins and burnt 281 calories average heart rate 148 maximum heart rate 183!
Hotpants on for every session that I do !
Thanks zaggora for my personal trainer :0)