Spin classes

I have been a bit slack with the updates of late but I have kept up the riding.  I signed up to do spin classes at a gym near my work. I thought the 45 minutes of riding a bike would be a nice supplement to my training on the days that I couldn't commute in. However after My first class I found that Spin or RPM they call it is bloody hard work!!! It is high intensity interval training with simulated hills based on resistance. The two young ladies that run the classes are super fit and look like they are ready to tackle the Tour De France. They bounce around to the frantic  music shouting out encouragement as the  doof doof beat becomes hypnotic.  Just when I think that I have the beat and can match my cadence the tempo changes " add another gear " the instructor yells as the class rises as one off their saddles and begins to climb. While I'm doing my best to keep up the pace,  the imaginary me is left languishing at the bottom of the imaginary mountain while the rest of the class is chasing the imaginary peleton over the peak of the hill. Even the imaginary down hill is no time for respite as we go into the "aero position" for an imaginary sprint to the finish line. (the longest 2 minutes ever!) After 45 minutes I'm drenched in sweat and there is a puddle of perspiration on the floor My legs feel like jelly but I think I'll do it again, but hopefully I can catch an imaginary tail wind on the imaginary mountain stage of that very real spin class!