I'm going to infer from Andy's post that streching may not be as valuable as fluid intake to avoid muscle ache (but I still think you should strech before a ride). And now that I think about it, muscle ache is generally caused by build up of lactic acid... fluid in the body helps carry that away. Also, coffe and alchohol are diuretics that limit the bodies ability to hold water and could compound that problem. So, I'm trading in the coffe cup for a litre water bottle that I plan to empty at least twice during office hours. Remembering more now... about how water helps the liver convert fat to glucose? More fuel for the muscles is always better