Sleeping is essential for good health. When people sleep too much or too little, the risks of various diseases increase. Research in Japan revealed that sleeping for more than eight hours or sleep irregularity might increase the risks of all types of mortality.
The Department of Epidemiology for Community Health and Medicine, Kyoto Prefectural University of Medicine, Japan, conducted a massive study that began in 2005 and lasted for nine years.
The results showed that sleeping too much or sleep irregularity increased the risks of all-cause mortality by 15 to 30 percent. The results were published in the British journal ScienceDirect on Oct. 10, 2022.
To study the association between sleep irregularity and the risks of mortality, lecturer Teruhide Koyama and his colleagues used data from the Japan Multi-Institutional Collaborative Cohort Study (J-MICC)….