Archive | Sleep Duration and Health

Long Sleep Duration is Associated with Increased Cardiovascular Risk

New research published in the Journal of the American Heart Association from the United Kingdom has found that long sleep duration is associated with an increased risk of cardiovascular disease while short sleep duration was not. Led by researchers from Keele University, along with colleagues at the University of Manchester, the University of Leeds and…

Sleep Loss Does Not Lead to Overeating and Obesity

Widely publicized claims have linked sleep loss to weight gain and obesity. These claims are based primarily on two very small studies conducted by the same researchers on young male adults. They found that, compared to sleeping nine hours a night for one week, sleeping just under four hours a night for a week was…

Long Sleep Duration, But Not Short Sleep Duration, Predicts Mortality Risk

Recently, the largest meta-analysis to date on sleep duration and mortality risk, involving 35 published studies and over 1.5 million adults, found that the increased risk of death associated with sleeping more than 7 hours was significantly greater than the risk of sleeping less than 7 hours. Regarding short sleep and mortality risk, previous studies…

The Human Brain May Be Designed for Seven Hours of Sleep

New research suggests that seven hours of sleep is associated with: 1. the lowest mortality risk while longer sleep is associated with greater mortality risk than shorter sleep; and, 2. peak cognitive performance for individuals between the ages of 15-75. In a study published in a February, 2016 issue of Nature, the world’s most cited…

The Eight Hour Sleep Myth

The eight hour sleep myth has been perpetuated by some sleep scientists, pharmaceutical companies that fund those scientists, and organizations such as the National Sleep Foundation that are heavily funded by pharmaceutical companies. This myth was the focus of a historic symposium at the 2016 annual national sleep meetings (the Associated Professional Sleep Societies). The…