i remember the first time i got back on the bike after a few years off it, i did 13km - up to the st margaret's end of the main runway at the airport, and back home, and i felt like death warmed up for nearly an hour after. i very obviously mistook strength for stamina.I did an hour on the hybrid this morning before work. Second time on a bike in 3 months (first time was cycling out to the start of the Ras last thursday - also did about an hour). Not sure if its lack of fitness or just that my body is falling apart, but its just not as easy as it used to be.