I took my first cycle/spinning class about a week ago and took the 2nd class this past Friday. What a workout! I was sweating buckets. After the initial class, I was sore from head to toe for 2 days. The past Friday, my core & thighs were on fire. Cathe's workouts, helped me a great deal. I was able to do the entire class. What have other people's experience been with cycle/spinning class?