I was talking to our massage therapist the other day and he is an avid cyclist.  He said he is too soft to go out in the winter now because he doesn’t like to get wet and cold.  Then he told me that since he rides on the rollers indoors he doesn’t listen to music or watch TV for hours! That takes some mental fortitude to do everyday.  I used to do that all the time.  When I would run on the treadmill, do the elliptical or ride the bike I would always relish in the fact that I could work out for hours just staring at a wall.