I voted "Not Very Tired" since our classes usually go for at least 2 hours, so after the 1st hour we are getting warmed up for randori.
Of course being in a non-airconditioned room under the stands of an indoor sports complex in the nicely humid Caribbean there are those who need the occasional water break though. But when it's a seniors only session or randori session however, just call us the "Hot as Hell" Dojo.
During these sessions we have the cooler filled with Beer for First Aid puposes, iow revival of those who have to be dragged off the mat.
If Pain is Weakness leaving the body, Sweat is Laziness leaving the body.