New research sheds light on the unexpected health risks of napping, urging a reevaluation of this common practice. Scientists have discovered that taking a nap may have negative effects on your health.

Experts warn that nearly 80% of American teenagers aren’t getting the recommended 8 to 10 hours of sleep. Bedtime routines, they say, aren’t just for toddlers—they could be the key to helping teens get the rest they need.