Sleep - Is 3 to 4 hours a night healthy?

South Africa
August 1, 2007 4:58pm CST
I sleep on average about 3 to 5 hours a night... I feel exhausted by the time the weekend hits and tend to catch some of it up by then. I feel that its unhealthy. Is there a way, some breathing technique or something crazy to make sleep more effective? In other words, is it possible to be awake and well on 3 to 5 hours sleep a night?
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