response: Oh, did you know in the 1980's there was a yoga boom?
original_response: Yeah, a hatha yoga boom happened in the 1980s, so it's relatively new in the Western public
history: I really enjoy doing yoga after a long week of stressful work. Oh do you? It's often used for therapy, did you know that?  And I understand that it's low-impact. Oh, yeah! That is what I use it for. How about you? Do you practice yoga? Well no, I don't.  Do you take a class?  I understand that yoga can involve music, breath work, imagery and meditation. Oh I didn't know about yoga with music.  I'd like to get a book about yoga, do you know of any? I do!  There's a base text for it.  It's called Yoga Sutras  of Patanjali. Oh that is very interesting. I have heard of hime before.
knowledge: A hatha ''yoga boom'' occurred in the 1980s, as unconnected to a religious denomination.