I'm wondering how tired you are after doing a moderate to hard ride? For me moderate to hard is about 2 hrs with an avg. computer speed of 15.5 or more. I ride on T,Th, and Sat and do a "boot camp" style workout on M,W,F. Sundays I usually don't work out. On Saturday mornings after a moderate to hard ride I am just completely wiped out. I get home, eat something, take a shower, and then I am just wiped out the rest of the day. Most times I take a nap for a few hours and even then I'm too tired to go and do anything. I just lay around the house and watch tv. I feel exhausted! All my other rides/workouts are in the evening so I go to bed within a few hours of getting home. Is this common?