We started learning the tai chi 108 this week. It's really cool. I'm surprised we started it now because it was scheduled for next year but Shifu said he wants us to fix our stances and 108 will help. He's got us doing super low stances while we do it and man is it killer on the legs! Although it is very difficult I can feel it making my legs stronger and my knees healthier already. I can't wait to show my mom how low we do it when I come home, she's going to flip out! haha.