Steady state is for a human being what sustainability is for humankind. It means that the physiological parameters of the human body have reached an equilibrium that allow them to continue to work the same way for a long period. When you run, a sprint is not a steady state, a jogging is.

In our case, it would be possible to make a sprint where the pilot doesn't eat neither sleeps for 72 hours, but it would be useless as this situation could never be sustained if the flight was to last longer for a reason or another. The pilot would be so tired that he would never be able to land the airplane.

So the goal here is to push the limits for the lack of sleep, the food patterns, the hygiene in the cockpit, the use of the toilets, the shifts of the mission team, but without going too far. Until now, not too far is already quite impressive!

Bertrand (remembering that my first profession was medical doctor)