the link I gave you is not about yoga.
Anyway it also depends on which yoga you choose and which asanas you work with. I had for a while a teacher who was making half an hour of hand-stands just before lesson, without ever coming down. (in the hand-stands you stand on your hands with legs up and head down, it is not easy at all I tell you). He was very good, never lost balance, nothing, he was passing slowly and focused from a position to another always standing up on the hands. He was very strong flexible balanced and on the big side. Great body. You see?