We all know lack of sleep is harmful to our health -- sleep affects mood, increases risk of psychiatric disorders and depression, cardiovascular disease and lowers immune system health. Yet the stress of running a company and long working hours means entrepreneurs often find themselves functioning on little sleep.
Evanston, Ill.-based sleep expert Dr. Lisa Shives says getting seven to eight hours of sleep a night is a critical component of entrepreneurs' business success. "Sleep affects our executive function; the area of the brain responsible for decision making, creative thinking, memory and reaction time," says Shives.
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