Eight weeks ago four couch potatoes decided they were going to run a marathon.  Ok not a marathon, a 10K race (to the couch potatoes, 10K or marathon pretty much amounted to the same thing).  They went out to train the first day.  Two of the four barley ran the 3K they had planned for the day, the other two jogged, walked part way, sat on a bench, and waited for the first two to return.  After...