Finally it seems as though the tiredness is going form my legs. I did feel generally tired at the end of my work day, but after a short break when I got home, I went out for a run. I realized that I am 7 1/2 weeks away from the 6 day race I will run at the end of April and feel that I am in pretty good space right now. The fact that the weather is getting warmer may have something to do with it also.