I work 4AM to 12 noon every day, then nap 2 hours, then work 2Pm to 6 pm on side projects. 6 to 7 Pm physical exercise, then sleep
Without that 2 hour nap I cannot do anything I’m too tired, you need to rest after work.
No children, no other commitments (I’m married but my partner finds my drive attractive, which is why I selected him)
I understand this might not be possible for people with more commitments