Sleep is one of life’s pleasures that many people overlook, even though we spend more than a third of our lives in bed. Hotel staff often ask their guests the familiar question - “How was your sleep?” The answer is usually “good” or “bad,” depending on the number of hours slept or how often we woke up for one reason or another. Sleep experts note a third factor - the regularity of our bedtimes. Maintaining a consistent bedtime and wakeup time, with a margin of error of no more than 30 minutes, is important, even during holidays and long vacations.
According to Dr. Jean-Philippe Chabot, a professor of medicine at the University of Ottawa, this guideline applies to all ages. Research in the United States indicates that most adults do not maintain a regular sleep schedule, which can lead to poor health, though the exact reasons are not fully understood. Scientists have found, however, that people who frequently deviate from a consistent sleep routine are more prone to certain health conditions, including cardiovascular disease, obesity, mental health issues such as depression and anxiety, and dementia. A 2020 study analyzed the sleep patterns of nearly 2,000 adults aged 45 to 84, and found that individuals with irregular sleep patterns were twice as likely to develop heart disease compared to those with consistent sleep schedules.
Another study in 2024, based on sleep data from tens of thousands of adults in the UK, showed that those with irregular sleep patterns were nearly 50 percent more likely to develop dementia than those with average sleep patterns. Sumi Lee, a sleep and aging expert at the University of Pennsylvania, stated that scientists are still unsure how frequent or severe sleep disruptions must be to increase health risks. The greater the deviation from normal sleep times, whether over a single 24-hour period or across weeks and months, the higher the risk.
In a comprehensive review of studies published in 2023, a group of sleep scientists concluded that there is sufficient evidence to recommend maintaining a regular sleep schedule to support metabolic, mental, and cardiovascular health. Researchers are still exploring why irregular sleep patterns negatively affect health, but their main theory involves the body’s circadian rhythm. Dr. Lee explained that the body’s circadian rhythm functions like an internal 24-hour clock, regulating the sleep-wake cycle as well as hormonal fluctuations, metabolism, cardiovascular function, the immune system, appetite, and mood.
According to Dr. Chabot, when you deviate from your usual sleep schedule, bodily functions that depend on these rhythms are disrupted. This can increase stress and inflammation throughout the body, which over time may affect cardiovascular health and metabolism. Disrupting the biological clock can also trigger hunger at unusual times, causing some people to eat late at night. This can negatively impact the digestive system and contribute to weight gain or obesity. So, how can you maintain a regular sleep schedule? Maintaining a regular sleep schedule can be challenging for many, but it is recommended to set an alarm an hour before bedtime each night to remind yourself to prepare for sleep.
Using that hour for a relaxing activity, such as reading or meditating, can help you unwind. It is also advisable to get 20 to 30 minutes of sunlight exposure every morning at the same time each day, preferably outdoors. Light is the primary cue that regulates your circadian rhythm. When morning light reaches your eyes, your body begins its countdown to evening, releasing hormones that signal it is time to sleep.
By Ahmad alsarraf
email: [email protected]
email: [email protected]
