I’m not exactly sure just what this priest said, or how it differs from the “official” stance of the Church on such practices, but it seems to me that the Church is more concerned with the spiritual aspects of these practices. As @Seek stated above, yoga is originally based upon spiritual practices in spite of western style yoga being almost completely stripped of the spirituality, as @JeSuisRickSpringfield alluded above.
Many Catholic clerics (especially the more conservative) will state that Tai Chi ”...is very difficult to practice it without the effects of the Oriental cosmology. It is meditative in nature and the movements and practice is specifically designed to interact with the alleged Ch’i.”
Also from the same source: “The postures, breathing, and exercise of Yoga is specifically designed to effect the body, mind, and soul according to a cosmology, ontology, worldview and philosophy that is contrary to the Christian worldview.”
I’ve also seen articles on the Church’s position on Reiki. (which has helped me in the past; whether or not the effect is psychosomatic is another discussion)
The official Church view on Reiki is that …it is a superstitious practice and ought to be avoided. The principle from which Reiki is founded upon borrows from the occult and ancient forms of sorcery and magic.”
Personally, I see it this way: the bible (especially the NT) is full of references to the “laying on of hands” and “miracle cures” by the early disciples. Is this not the same thing?
(Just to be clear, I was raised Catholic, but I no longer practice because my belief system has evolved in a completely different direction). I did study a couple years for the priesthood, and my answers concerning the Church are based upon that, not necessarily on my own beliefs.