Not a big deal. My first day of doing unusual attitudes followed by steep turns I got sick. I felt a little queezy a few times after that but in time you will develop a tolerance. Alot of it is stress related I found since you are new to the airplane and new to the manuevers and concentrating so hard on all of the small details. I only have 250 hours now but I havent felt a hint of sickness through any instrument training of commercial maneuvers