I did the new ministry of sound dvd for the second time today. Yes, I'm absolutely crap at keeping up with the choreography, yes I did have to stop and wonder what the heck they were doing, and yes, I collapsed into a heap on the sofa the minute I was done. But you know what? I did better than the last time. I like it right now because it's keeping me interested, and keeps me trying to learn the right moves.
I don't have a huge amount to lose, but I have poor stamina, and I think this should really help.