I guess I'm the exception here . . . got 10 hours of solid sleep last night, didn't wake up until the alarm went off. I find the older I get, the more sleep I need (61 now), and esp. so if I've had a tough ride that day.
After a double century it's not unusual for me to sleep 12+ hours, but I'll get in a good ten after a century with a lot of climbing . . . and that's even if I take a nap in the afternoon directly after the shower/eat routine known as "food coma."
And if my wife and I are in our cabin in the mountains (at 6,700 ft. elevation) we can do a tough moutain bike ride, shower/eat, be in bed by 7:00PM and not get up until 8:00 or 9:00AM. We blame that on the altitude! So, anyway, Your Sleep Time May Vary!
Rick / OCRR