Comment by lsllc

As a 15+ year Yogi (who practices regularly, well at least until C19!) I've never heard of these either!

According to Wikipedia:

  * Hatha is seems to be a branch of Yoga (Hatha apparently means "force")
  * Ashtanga is another type of Yoga brought to the modern world by Sri K. Pattabhi Jois and involves synchronizing breath with a series of positions.

Interesting ... I'll have to look into them!