New Study Links More REM Sleep to Lower Risk of 83 Diseases

A large-scale study encompassing nearly 95,000 participants, published in PLOS Medicine, has identified a significant link between the amount of REM sleep individuals get and their risk of developing various health issues. The research indicates that greater amounts of REM sleep are associated with a reduced risk of 83 different conditions, including heart failure, dementia, and Parkinson's disease.

The study suggests that for individuals sleeping the recommended 6 to 8 hours per night, approximately 22 percent of their sleep time is spent in the REM stage. This translates to about 90 minutes of REM sleep for someone sleeping seven hours, highlighting its importance for cognitive function and restoration.

Deep sleep was also identified as a critical factor. Higher durations of deep sleep were linked to a decreased risk of seven specific conditions, such as type 2 diabetes and major depressive disorder. In the healthy sleep range, individuals spend roughly 27 percent of their sleep in deep sleep, equating to between 1.5 and 2 hours per night.

These findings build upon existing research emphasizing the importance of both sleep quality and quantity for overall health. Previous studies have consistently shown that adequate sleep (7-9 hours) reduces mortality rates and improves cognitive performance. The regularity of sleep patterns, such as consistent bedtime and wake-up times, may even be a more potent predictor of mortality than total sleep duration.

The research underscores the dual importance of sufficient REM and deep sleep in disease prevention and maintaining long-term health. Individuals consistently sleeping less than six hours per night face a considerably elevated clinical vulnerability.