Unhealthy habits and underlying conditions contribute to interrupted sleep, reports Harvard Health Letter.

“We see more interrupted sleep in older adults, although you shouldn’t automatically blame frequent waking on your age,” says Dr. Suzanne Bertisch, an assistant professor of medicine at Harvard Medical School.

Sometimes older adults find they wake early in the morning, when they feel they should be sleeping. But that often reflects your schedule for sleeping and waking, not disrupted sleep.