Sleep hygiene is the best way to ensure your brain’s well-being. When you stay awake for too long, or sleep for more than the usual hours, it throws off your body clock and affects your health. Sleeping for the recommended 7-9 hours improves your brain performance, mood, health as well as your long-term well-being. Not only does lack of sleep lead to heart diseases, but also obesity and other disorders like dementia. Other than these issues, sleep hygiene involves other things like your bedtime routine, what kind of mattress you sleep in as well as what position you sleep in. Different studies have been done on the same, and research shows sleeping on your back could also affect your brain A study showcased in the Alzheimer's Association International Conference indicates that sleeping on your back, called the supine position, might be linked to a higher risk of brain diseases like Alzheimer's and Parkinson's. While this research shows a strong connection, it doesn't yet prove that back sleeping causes these conditions. The study adds to earlier findings suggesting a link between back sleeping and neurodegenerative diseases. The idea that back sleeping could contribute to neurodegeneration isn't entirely new. It was first explored in mouse studies back in 2015. Later, in 2019, human studies involving individuals with neurodegenerative diseases showed that sleeping on their backs for more than two hours a night was connected to a higher risk of these conditions. The latest study further explored this by comparing healthy individuals with those experiencing mild cognitive impairment or various neurodegenerative disorders. They found that people with brain conditions spent significantly more time sleeping on their backs. Back Sleeping Doesn't Directly Cause Dementia While these findings are certainly interesting and could point to sleep position as a factor we can change to reduce our risk of brain diseases, it's crucial to acknowledge some limitations. First, these results have only been presented at a scientific meeting and haven't yet gone through a thorough review by other experts before being published. Also, the groups of people in the study weren't perfectly matched in terms of age and gender, which could affect the findings. Finally, the study was sponsored by a company that sells sleep tracking devices, so there's a potential for bias. How Back Sleeping Might Impact Brain Health Experts believe that sleeping on your back might harm brain health because it could hinder your body's ability to efficiently clear out harmful substances. During sleep, your brain has a "waste management system" called glymphatic clearance that flushes out neurotoxins. This process naturally becomes less efficient as we age. When you lie on your back, it might not allow blood to drain from your brain as effectively as it should, potentially slowing down this critical cleansing. In contrast, sleeping on your side appears to promote better blood flow and waste removal. Additionally, sleeping on your back can worsen sleep apnea, a condition that disrupts sleep and can lead to even more toxin buildup in the brain over time, further contributing to neurodegeneration.