Why?

I've rejoined the gym... tonight was kettlersise... a class where you swing around a heavy object that looks like a bowling ball with a handle.

Last week I tried my first circuit class in ages... My mind was all up for it... I was flinging myself around like a mad woman... it was going so well... until the next day... my legs were so stiff and achy that they wouldn't bend... trying to go to the loo was a nightmare... when I actually managed to sit down, I found that I was then stuck there unable to get up again.....

I'm sure it will all be worth it, once I get back into my flow...