I'm just like that. I can sleep for 10 hours but I wake up feeling rested but lethargic. There seems to be a sweet spot where I'm rested enough (but not letharg

I'm just like that. I can sleep for 10 hours but I wake up feeling rested but lethargic. There seems to be a sweet spot where I'm rested enough (but not lethargic) and with a good energy level. The sweet spot seems to be between 7 and 7.5 hours.