To my understanding there are different forms of T'ai Chi. I did take 1 course many years ago...to me, it was memorizing all the movements which I couldn't be bothered. My hang-up.
Different schools of t'ai chi for different purposes/injuries: http://www.taichi.ca/about-what-is-t...en-wu-sun-hao/ Perhaps read their instructors' backgrounds also on how tai chi helped them.
https://www.bing.com/videos/search?q...98ED&FORM=VIRE Only gives a few movements for 5 different types of tai chi.

I practice 2-3 pre-tai chi warm-up exercises (but I don't practice tai chi)..it's intermingled with simple yoga and other stretching exercises. 1 of the exercises is like a half bird pose and I cross over down towards the floor, diagonally on each side several times. Just after my concussion, I couldn't do it. But could after 3 months .. Same for the simple tree yoga pose.

Our body balance is very important and safe stretching..