Sorry, really late in finding this one.....
I used to be an avid fan of "spin" classes… I took 3 classes a week (sometimes two hours long each) and loved them, lost over 2 stone and was the fittest I had been in a few years. I felt invincible after every class and usually went on to do around 30 minutes weights and then a swim 40 lengths (front crawl at pace) straignt after the class...seriously, it was fantastic
But.
It's hard work, especially on the heart.
I used to go to Virgin health in Bromley (previously Holmes place) and I am afraid to tell you that two of the guys I rode with both suffered heart attacks "on the bike" and tragically died as a result, one in the room whilst the class looked on in horror.
In addition, one of the instructor's that I had, suffered an aneurism whilst taking the class and collapsed vomiting and was rushed to hospital for emmergency brain surgery (she made a full recovery) admittedly this could have struck at any time ....and she was a multi-marathon athlete so was extremely fit.
The other instructor who witnessed both fatal heart attacks, can no longer take a class, I recall her name way Yvette, (she was fab and now does circuit training I believe)
I cancelled my classes due to work changes (not the above) and subsequently cancelled my gym membership as I took up riding to work instead (a great move).
This issue was not reported in any local papers and never made any headlines (that i noticed) despite a senior police officer attending to one of the victims and complaining about lack of CPR equipment within the facility.
Sorry to be so frank about a really tragic occurrence (especially if anyone is known or related to the two chaps in that I mentioned) but the impact of spin classes on the un-trained cannot be underestimated.
Take it really easy for a good few weeks before trying to keep up with the hard core spinners