Brain power vs muscle power. Let us not be silly that these are the same. But also, I'm on team "Its really hard to do the same mental job ~20 hours a week".

Brain power vs muscle power. Let us not be silly that these are the same. But also, I'm on team "Its really hard to do the same mental job ~20 hours a week". I can do 2hr x 3 cycles x 5 days a week. But that means breaks.. When I did 12 hour days I was terrible at hours 9-12.