I've been meaning to ask this for a while...am I the only person in the world who needs about AN HOUR on the bike before my body feels like it's "in the groove"? Of course, (1) I'm 36 and (2) this is the most athletic I've ever been in my life. I did not grow up doing sports. Will my body ever adjust and warm up more quickly? It's so frustrating at the beginning of a group ride, when I feel like there's no way I can keep this up. But after about an hour, I "settle in" and feel like I can ride--not fast, mind you--all day. Which I have. Any ideas?