Getting a sufficient amount of sleep is so vital that the American Heart Association (AHA) added sleep duration to its checklist of habits for a healthy heart in 2022. But other, lesser-known aspects of sleep beyond how many hours you clock each night may also be important, according to a scientific statement from the AHA published in the May 2025 issue of Circulation: Cardiovascular Quality and Outcomes . “The dimensions of sleep health are just different aspects of sleep, such as quality,