Blogging make you tired?

How much you make a post in one day?
As for me, it depend on the job that has been given to me. but I know some bloggers that make more than 20 post a day.

Normally, I will update all my blogs daily. But in a certain condition, I will update it once a week. The total of my posts is 6 average. I wonder how they can post above 20 entry per day because blogging also tired, don't you think so?

Come on, tell me how much do you do!