Sleep deficiency is a ubiquitous phenomenon among Americans. In fact, in the United
States,∼ 78% of teens and 35% of adults currently get less sleep than recommended for …

Abnormally short and long sleep are associated with premature mortality, and achieving
optimal sleep duration has been the focus of sleep health guidelines. Emerging research …

Irregular sleep and non‐optimal sleep duration separately have been shown to be
associated with increased disease and mortality risk. We used data from the prospective …

Background and Objectives Irregular sleep may increase the risk of cardiometabolic
conditions, but its association with incident dementia is unclear. The aim of this study was to …

Abstract Study Objectives Although insufficient sleep is a risk factor for metabolic syndrome
(MetS), the circadian timing of sleep (CTS) is also involved in cardiac and metabolic …

The burden of noncommunicable chronic diseases has relevant and negative
consequences to persons, health care systems, and economies worldwide. Chronic …

Objective Sleep quality and duration are important for biological restoration and promotion
of psychological well-being. Optimism may facilitate or result from sufficient sleep, but …

Context Along the menstrual cycle, associations between inconsistent sleep duration and
levels of metabolic biomarkers are uncertain and could involve fluctuations in estrogen …

Study objectives Although sleep affects a range of waking behaviors, the majority of studies
have focused on sleep loss with relatively little attention on sustained periods of adequate …

While the role of sleep for physical as well as mental health is considered fundamental for
every human being, quantity and quality of sleep are very sensitive to changing …