I was thinking, what draws so many super dedicated athletes to bike racing? It sure isn't like the local 5k with so many different levels of skill. The level of talent seems amazing even in cat 4 and 5. No obese people racing bikes at all, doing triathlons yes. I got top 5 percent bike splits on a road bike without aerobars on triathlons, now that I'm doing bike races, I'm pushing 100% to finish mid pack. It really impresses me and is quite humbling. Any ideas why only the best even sign up?