Insomnia can lead to heart issues. A psychologist shares tips for better sleep.

About 10% of Americans say they have chronic insomnia, and millions of others report poor sleep quality. Ongoing research has found that bad sleep could lead to numerous health problems, including heart disease.

Dr. Julio Fernandez-Mendoza is a professor of psychiatry and behavioral health, neuroscience and public health sciences at Penn State College of Medicine. He discusses the need for sleep, why teenagers require more sleep than adults, and how you can get a good night's sleep without medications.

The Conversation has collaborated with SciLine to bring you highlights from the discussion that have been edited for brevity and clarity.