thanks everyone for your replies. I guess I am not taking it easy enough durring my down time. I am 31, mother of twin boys who are almost 3 years old so I spend alot of time chasing after them.

Grog - My HR gets up to 200+ easily, I can be on the bike just spinning a high cadence on a very low gear for a couple minutes before I hit 190's and my recovery rate will be near 160 - 170. My resting HR is 100. I went to my cardiolgist on Friday and have had a bunch of test done, EKG, 24hr Heart moniter, ultra sound on my heart yesterday and ofcourse blood work so hopefully that will tell me something if not we are going to do a stress test next on a treadmill.

I am learning every day and I just think that I should be able to do these things, I have two days to rest before my next spin class and hopefully I will be ready. I need to learn to listen to my body. Thanks everyone!

Heather