Just found this nice article by Danny Dreyer. I sometimes experience
this lack of zest when running, and I like his approach - to do
something to get the energy flowing again. I'll try something similar
the next time I feel this way.
http://www.chirunning.com/blog/2008/04/14/it-takes-energy-to-make-energy/
Yanni
Barefoot runner since December 2004.