It doesn't take a rocket scientist – or a somnologist – to figure out that sleep impacts our health. What many of us don't know, is just how many different aspects of our functioning sleep can affect. "It's not just diabetes, it's not just heart disease; it's memory, learning, depression, mood," says Kristen Knutson, a National Sleep Foundation poll scholar and assistant professor of medicine at University of Chicago. "There's a huge effect of sleep across the board for us, throughout our lives."
We aren't yet able to calculate the perfect amount of sleep for each person, but studies have shown that seven to eight hours of quality rest is likely the sweet spot. In order to achieve optimum sleep, Knutson says people should do their best to stick to a sleep schedule, shut down electronics well before bedtime, and recognize that sleep is an important part of a healthy lifestyle.
Stress obviously interferes with sleep, but lack of sleep can also impact your stress level. "In experimental studies, if you're restricting sleep, you see higher levels of cortisol, which is a stress hormone," says Knutson. This is likely related to the increased activity of the sympathetic nervous system that can occur as a result of poor sleep.
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