Have you been stressing about getting more sleep? It turns out that, statistically speaking, if you slept 5 hours, you’re better off than if you slept 8. And if you slept 6.5 hours, you lowered your risk the most. In an amazing study published at health.ucsd.edu, a UCSD professor of psychiatry specializing in sleep research and aging has determined that there is no statistical health-related reason to sleep longer than 6.5 hours per night.
It’s hard to argue with him. He is using sleep data from the Cancer Prevention Study II (CPSII) of the American Cancer Society. In fact, that data shows that sleeping 5 hours per night (as I’ve done for the last 18 months) is slightly *safer* than sleeping 8 hours per night, at least if you define safe as “not dying.” Check out the charts: