The science of sleep continues to delve into the quantity and quality of sleep needed for maintaining physical and mental health. Sleep deprivation is no longer considered a badge of honor, and poor sleep habits have been linked to an array of physical and mental health concerns.
Sleep deprivation is no longer considered a badge of honor.
Physical Impact of Poor Sleep Behaviors
A new five-year study funded in part by the National Heart, Lung, and Blood Institute (NHLBI) published by the American Journal of Cardiology on March 2, 2020, reveals that people who do not adhere to a regular sleep schedule with fixed bedtime and wake up schedules are more than twice as likely to develop cardiovascular disease (CVD).
The study group was comprised of older people ranging in age from 45-84. A sleep evaluation was administered to the individual in the group, who were then followed for about a five-year period from 2010-2016.
The technology employed for the study included digital sleep trackers called actigraphs that monitor wake and sleep cycles for seven-day periods. Participants were also given a sleep assessment test called a polysomnography. Among the 111 study participants who developed CVD during the study period, the data indicated that those with the most irregular sleep patterns had double the risk for the disease.
Specific markers that increased for the study group included higher levels of blood sugar and inflammation, which in turn place people at a higher risk for diabetes, CVD, and obesity. Michael Twery, PhD., director of the National Center on Sleep Disorders Research noted that the new study is the largest of its kind, and establishes a definitive link between sleep problems and CVD.
Insomnia and its Impact on Mental Health
But a poor sleep schedule doesn’t just take a physical toll on the body. More evidence is arising from sleep studies to indicate that the toll on mental health well-being is equally as troubling. In December 2019, the scientists Michael Bonnet and Donna Arand published a paper, Risk factors, comorbidities and consequence of insomnia among adults (Wolters Kluwer) that addresses the mental health consequences of insomnia. In fact, the authors noted that nearly 50% of patients reporting symptoms of insomnia also are affected by other psychiatric disorders. Insomnia imparts a number of adverse symptoms, including:
Fatigue
Sleepiness
Confusion
Tension
Anxiety
Depression
Having a proclivity for experiencing insomnia increase with a number of risk factors. Women (especially those who are peri- and postmenopausal,) older individuals, people who have had previous episodes of insomnia, and those with a family history for the disorder are at higher risk. People with insomnia also can suffer from trait sleep reactivity, in which people suffer from an exaggerated sleep reaction when they experience stressful events. Among older adults, early wake times are a marker for insomnia, while adolescents and younger adults are more likely to experience difficulty falling asleep. For the spectrum of people who suffer from substance abuse disorders, insomnia is a very commonly reported condition across a wide variety of substances and through different stages of illness. For people with alcohol dependency, their insomnia often predates their problem with substance abuse, and insomnia in turn is an important risk factor for relapse among those who are in remission. Not too surprisingly, a large number – 80% - of patients with depression also report insomnia. Similarly, the majority of patients with anxiety also report that they have symptoms of insomnia. PTSD is also highly correlated with sleep problems: the authors note one study indicating that 70-90% of PTSD sufferers have difficulty falling or staying asleep.
In Conclusion: Research is Showing that Sleep is Integral to Overall Health
Having established a link between poor sleep hygiene and CVD, future research will also attempt to establish a link between biomarkers that explain the link and are indicators for enhanced risk.
Researchers note that disrupting the circadian rhythm of sleeping and waking cycles affects metabolic functions and causes a spike in cholesterol among other problems. But further research is required to gain more insight and to establish conclusive finings in this area.
One thing is certain: good sleep hygiene is beneficial. Most adults fall in the range of needing 7-8 hours of sleep per night. Just like maintaining a healthy diet and exercising, sleep is integral to health.
Centerway Behavioral Health has comprehensive services to help with Sleep Disorders.