Originally Posted by
Machka
No.
For 6-8 hours of riding you shouldn't have to do anything special ... 6-8 hours isn't that "large and long".
Unless, of course you rarely ride that much. Big workouts are relative to your normal workout. If someone rides 5-10 miles once or twice a week, a 6 hr century is a HUGE ride. If they ride 20-40 miles 3-4 days a week and knock out a metric on the weekends, then a 6-8 hr ride isn't that big a deal.