Yes truly we tend to overestimate the our body's abilities. I remember reading an article of a young and successful executive at Adobe India who prided himself

Yes truly we tend to overestimate the our body's abilities. I remember reading an article of a young and successful executive at Adobe India who prided himself at being very fit (used to run marathons) and also being able to make do with just 3-4 hrs of sleep. He died of cardiac arrest at 35. Thats when I have decided to give myself atleast 6 hrs of sleep daily. Im guessing it should be enough sleep needed.