I think my age (39) is starting to catch up to me or I am just getting a bit burned-out on the bike. Last year, I rode 9,001 miles; my best year ever. Over my 3-week break before I began teaching summer school, I put in 1,100 miles and then still rode a bunch in the mornings and in-between classes (about 40-50 miles a day). Fast forward to this summer and that same 3-week break, I feel as if I am barely squeaking out a 200-225 mile week. I just feel tired on the bike, legs hurt, and just sort of a lack of motivation. I am no speedster on the bike and hover in the 18-20 mph range on a ride; sometimes 1-2mph faster or slower. I have backed off my rides to 30-35 miles...more out of necessity, in that longer rides just take too much out of me. Anyone else hit the wall, so the speak.