The author perfectly explains the connection between sleep quality and Alzheimer's disease. I recently learned about the schedule for changing the body temperature of the human body during the 24 hours. So, in the hours of lowering the body temperature, you should go to bed immediately. It will help to get better and sleep for a shorter period of time.

The longer a person sleeps, the better he will sleep! =This is a FALSE statement. When I go to sleep not when my body waits for rest according to his personal schedule, but when I choose myself --> I exhaust myself (maybe very late at night, or very early-in the middle of a white day). But when a person personally chooses the optimal sleep hours for her, she feels better than the one who sleeps a standard time: from 20.00 (22) to 6.00 (7).

For example, Winston Churchill first introduced the term "restorative sleep". He believed that the afternoon dream helped restore the clarity of thinking necessary for decision making in wartime. He argued that we needed a little sleep between lunch and dinner. He slept at night not so much (no more than 5-6 hours), but supplemented this with a short day's sleep. Therefore, he had better health than his contemporaries.
"The difference between successful and very successful people is that very successful people almost always say" no. "/ Warren Buffett/ So, learn to say "no", if something prevents you from going to rest during the time, suitable for the best sleep for you!