
Originally Posted by
Dogmama
Fast means 80% of your max heart rate - you should be breathing hard & sweating!
Well, I know I'm out of shape! For me, fast in spin class means more like 98% of max HR, and I am DEFINITELY breathing hard and sweating! 
Have you tried putting in a short second workout every day? Like 25 minutes in the morning if you are an evening workout person? Or 25 minutes in the evening if you workout every morning? Just a little extra exercise to surprise the metabolism?
And wow...you are my hero... a 100 pound weight loss. VERY inspiring.
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury