0 to 3 months 14 to 17 hours
4 to 11 months 12 to 15 hours
1-2 years 11 to 14 hours
3-5 years 10 to 13 hours
6 to 13 years 9 to 11 hours
14 to 17 years 8 to 10 hours
18 to 64 years 7 to 9 hours
65+ years 7 to 8 hours
Still, you have to adjust for your own physical constitution. I read an interview with Dr. Michael DeBakey who was instrumental in the field of heart transplants and he finally confessed that he needed only 4 hours of sleep, but he never told anyone because he didn't want people to think he was working under the influence of sleep deprivation!
In general, if you sleep less than 5 hours a night, you're setting yourself up for heart disease. Less than seven hours gets you diabetes, obesity or weight loss.
You know what to do. Get off the devices two hours before bed. Reduce caffeine, get some exercise during the day, have a balanced diet and reduce your stress. Yeah, about that last one. Do what you can to offset the toll it's taking on you.
Just do the best you can, Claudia
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