People tend to check in during these times:
Ctrl + alt + del for the body
First class is always difficult. If you can get through it next ones get easier. Try to warm up in the room 5-10 mins before class to adjust to the room temperature. Helps a lot!
The classes here are generally less-packed than the Back Bay location!
Eat a little bit of fruit before the 6am class.. It will give you just enough energy!