This article, from The Atlantic, is a few years old and most certainly out of date. But it’s worth sharing for this line alone:
In a high-school science-fair experiment in 1964, a 17-year-old stayed awake for 11 days. Since then, standards for science-fair safety have changed.
"The best productivity hack is getting 8-9 hours of sleep every night. Second best is exercising 30-60 minutes each day. Both are obvious and overlooked, and yet make a more meaningful and immediate impact on the quality of your thinking than 99 percent of productivity tips."James Clear