[scottyallen]

9 hours is my sweet spot. Anything less than that, and I don't think as well. Below 8 and I'm generally a bit of a zombie, and operating at 50% speed. Above 10 and I tend to get groggy and depressed.

[maratd]

We seem to be cut from the same cloth. I would add that my sleep requirements vary based on my work load. If my work requires me to really think things through, definitely 9 hours to get back to normal. If its routine stuff, I can get away with 7 hours.

[staunch]

I'm with you guys. Do we all not exercise? :-)

I ask because during times when I get regular strenuous exercise this number comes down to about 7.5-8 hours.

[abhijat]

This is interesting. I sleep close to or less than six hours a day and I work out everyday (lifting heavy weights and running 5 Mi alternate days).

I do get really deep sleep though. I would really prefer if I could sleep longer but my job shifts prevent that.

[clicks]

Somewhat similar experiences here.

9 -10.5 hours normally, 7-9 hours if I've been working out routinely.