Bhassler wrote:Probably because he lacks the requisite leg strength and flexibility to sink and take longer steps. Which is fine, considering he's probably about 90....
Anyone with regular, long term training experience in the Chen Style Tai-Chi Chuan will normally possess well developed leg strength, since the established standards of performance require longer steps and lower stances than most other styles of Tai-Chi Chuan.
It is reasonable to expect that this has been true in Master Xiao's training experience as well. Thus, it is more likely to surmise that he may suffer from arthritic pains in his hips, knees, and ankles due to advancing age, or that he experiences some minor disability from past injuries as a cause of his stepping anomalies. From the educated perspective of my clinical eye, he appears to favor his left leg and foot more than the right, although both sides seem to be affected in varying degrees.
Imagine, if you can, your own elderly parents, grandparents, aunts, or uncles performing the same routine at the same age as Master Xiao. All things considered, we should all be so fortunate as to be physically capable of performing the demonstrated form set as well as Master Xiao does at his age.
Doc