Ooh, riding, I'd love to get back into that. I love how you don't realise how much you've exercised until you get off and your legs wobble :) But again, it's bad for my back, both the posture of it and all the bumping.

I'm not too bad on a reclined bike at my personal trainer's, but I wouldn't want to do that for more than 5-10 minutes at a time.