I include some injury statistics here from NIH: The new online course "Martial Origins of Tai Chi" (Classical Tai Chi at Teachable.com)
"The hand/wrist was the most common area injured (53%), followed by the shoulder/upper arm (27%) and the forearm/elbow (19%). Joint sprains/muscle strains were the most frequent injuries reported overall (47%), followed by abrasions/bruises (26%). ... Injuries may result in chronic upper extremity symptoms."