You Can’t Do Your Job if You Don’t Sleep – Tony Schwartz – Harvard Business Review
You always hear about the effects of diet and exercise on cardiovascular health, but why not sleep?
… sleeping less than 6 hours a night increases the risk of developing or dying from heart disease by an astonishing 48 percent.
and:
There is no single behavioral change we’ve seen in our work with thousands of executives that more quickly and powerfully influences mood, focus, and productivity than a full night’s sleep.