Train Your Brain for Better Sleep
https://www.cnn.com/2021/05/26/health/sleep-hygiene-tips-wellness/index.html
Less Than Six Hours of Sleep Tied to Higher Cardiovascular Risk
https://www.thecardiologyadvisor.com/general-cardiology/less-than-six-hours-of-sleep-tied-to-higher-cardiovascular-risk/
What’s the Right Amount of Sleep for a Healthy Heart?
https://www.usnews.com/news/health-news/articles/2021-05-05/whats-the-right-amount-of-sleep-for-a-healthy-heart