What is the nature of work for a executive chef?

I'm a cook in nyc. I start my day at 9 AM and don't get out of the kitchen until 11 PM. Get home around 12, sleep and wake up at 7:30. I do this 6 days a week and on my feet the whole time. I only sit down when there's a seat on the subway and in the bed. The chef even works longer. This business isn't for weak people.... it is the hardest industry you can get into by far.