I sleep an average of 8-10 hours a night, but that number really changes with the seasons. I'm the kind of guy that likes to wake up at first light, so in the summer the amount of sleep I get is closer to 6-8 hours on average. In the winter I lean closer to 9-10 hours, but I still get up in the dark and it really feels strange to me.
Longest sleepless run? I have done more 'All-nighters' than I care to remember. I think 33 hours is about the longest without sleep, but on several occasions I've gone 72-80 hours with a short 4 hour nap to split the run. You'd be amazed at how 4 hours of sleep and a shower can boost your energy.
As for marathons, how about a 70 hour work week with another 28 hours of commuting added on to that sustained for 6 and a half months. (A little detail, I am not able to sleep on buses so I was not able to sneak in and extra sleep in transit.) You do the math.
Nuf said, Cheers!
