A new study from the University of Oulu in Finland indicates that a consistent bedtime is crucial for lowering the risk of major cardiovascular problems. Researchers tracked the sleep habits of over 3,000 individuals, finding that those with irregular bedtimes and less than eight hours of sleep per night showed double the risk of serious cardiac events over the next decade compared to regular sleepers.
While sufficient sleep duration offers some protection, bedtime regularity emerged as a significant factor. The study observed greater variability in bedtime among irregular sleepers, averaging 108 minutes compared to 33 minutes for regular sleepers. This disruption of natural circadian rhythms is believed to impact the heart's recovery periods. Although cause and effect cannot be definitively proven, the association is notable, especially given that cardiovascular diseases are the leading cause of death globally.