Originally Posted by rickair7777

I can handle it short-term, but yes I certainly will need to catch up within a week or I get grumpy.

But some folks definitely thrive on four hours, or even less, of sleep long-term, apparently it's genetic. Many of your CEOs, national politicians, O10 military officers, etc fall into that category. It's how they work 100 weeks, get ahead, and still feel they have a life.