10 hours in the saddle certainly tested my constitution but my bike is fitted with a wide seat and gel-insert, matched to a Cane Creek Thudbuster seat post, making long rides a relatively comfortable experience.
It must be noted that 2 hours of the ride were spent waiting for others to make repairs and maintenance stops and 3 hours were spent (infuriatingly) waiting for others to get on with the job of finishing their gasping sticks.
Drives me nuts when people decide to go on a long ride and waste a third of the time, constantly interrupting the ride with cigarette breaks; worse still when refueling their bike, complete with cigarette hanging from their mouth, whilst looking into the fuel tank, thereby forcing me (in dramatic style) to grab my drink bottle and drench the heck out of them, simply to protect my personal safety.