To be fair, I did segregate myself--but only after pausing a couple of times in the routine to massage my hands and wrists (to the point where I felt I was disrupting those around me).

My wife has done this before (she was unable to handle a certain type of movement based on her ability that day), and every time the teacher has done a quiet check-in to see if other movements could work for her body for that class. Apparently, that's how it's supposed to be handled instead of the ageist stupidhead stuff your teacher did.

Hrmph. I'm sorry you had yoga with such a ninny.