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Snooze longer.

People who sleep less than seven hours a night have higher levels of the stress hormone cortisol, which leads to elevated blood pressure and an increase in belly fat that’s linked to heart disease and diabetes, according to Goldberg. For balanced cortisol levels, avoid light exposure from your TV or computer after 10 p.m. so your adrenal glands can start releasing the sleep-wake hormone melatonin, which helps regenerate your body while you sleep.