For years, I believed that as long as I got my recommended eight hours of sleep, I was on the right track for good health. Like most of us, I never gave much thought to how my sleeping position could influence my well-being. However, a recent study caught my attention, and I realized there’s more to sleep health than simply counting hours.While it's well known that getting enough sleep is essential for maintaining good health, a study presented at the 2024 Alzheimer’s Association International Conference suggests that the position in which we sleep could play a crucial role, especially when it comes to brain health.The study, led by Daniel J. Levendowski, president of Advanced Brain Monitoring, indicates a possible link between sleeping on your back—also known as the supine position—and an increased risk of developing neurodegenerative diseases such as Alzheimer's and Parkinson's. Link Between Back Sleeping and Neurodegenerative DiseaseLevendowski’s team first noticed this connection in 2015 when experiments conducted on mice showed that back sleeping might contribute to neurodegeneration. Building on this, the research team conducted further investigations, first in 2019 with 45 human participants and more recently with a larger sample size of about 300 people.The participants were divided into groups, including a control group of healthy individuals and participants with mild cognitive impairment or neurodegenerative conditions like Alzheimer’s and Parkinson’s spectrum disorders. Using the Sleep Profiler—a device developed by Advanced Brain Monitoring—the researchers tracked sleep positions and found that those with neurodegenerative conditions spent more time sleeping on their backs than the control group.“The Sleep Profiler software extracts nine key biomarkers related to neurodegeneration, and time spent in the supine position is one of them,” Levendowski explained. According to the study, participants with cognitive disorders slept on their backs for over two hours per night, significantly more than the healthy individuals.Risks of Back SleepingOne possible explanation for the connection between back sleeping and neurodegeneration lies in the body's ability to clear out neurotoxins during sleep. The glymphatic system—often described as the brain’s "waste management system"—works to remove toxins while we rest. However, this system becomes less efficient with age, and sleeping on your back could further impair the brain’s ability to flush out harmful substances. Additionally, sleeping on your back has been linked to worsening sleep apnea, which disrupts rest and potentially increases toxin buildup, leading to long-term damage.While these findings offer compelling evidence, it’s important to note that the research has yet to undergo full peer review, and limitations, such as unmatched control groups, leave room for further investigation.3 Sleep Positions That May Help You Sleep Better1. Side Sleeping (Lateral Position)One of the most recommended positions, side sleeping, particularly on the left side, has been shown to improve blood circulation and support glymphatic clearance. It can also reduce symptoms of acid reflux and help alleviate snoring or sleep apnea.2. Fetal PositionCurling up into a fetal position, with your knees drawn toward your chest, can help reduce pressure on your spine and improve breathing patterns. This position is often considered one of the healthiest for reducing sleep apnea and snoring.3. Stomach Sleeping (Prone Position)While not ideal for everyone, sleeping on your stomach can help reduce snoring and sleep apnea. It also encourages better spinal alignment. However, it’s important to use the right pillow to avoid straining the neck.While further research is needed to establish a clear link between sleep position and neurodegenerative diseases, this new study highlights the potential importance of how we sleep, not just how long. Making simple adjustments to your sleep position could be a proactive step towards better brain health.