Couldn't do any more

Sometimes you just feel that you're just not up to it. I managed to convince myself not to drive straight home but actually go into the gym and see how I'd get on. Well, I dragged myself up the stairs and onto the stairclimber and to be honest, I wasn't sure whether I was able to do my full 30 minutes, but I actuall did. The bike though, that bloody bike, I got on, cycled for a few minutes and I just knew. Not tonight, definetely not tonight.