Yoga is a group of physical mental, and spiritual practices. Do you do yoga?
I do yoga by myself.  I don't go to classes.  It's healthy to stretch with yoga.  what do you know about yoga?
I think yoga is a fine way to exercise, there are a lot of different ways to do yoga, from a broad variety of yoga schools.
Interesting.  I'm wondering how many yoga schools exist in the United states?  
I'm not sure but I know the most well known types of yoga is hatha yoga.
How cool.  I didn't even know there were different types of yoga.  I just know yoga is very healthy for muscles and I have arthritis so that would be good for me
to pre-Vedic Indian traditions; it is mentioned in the Rigveda, but most likely developed around the sixth and fifth centuries BCE, in ancient India's ascetic and śramaṇa movements. The chronology of earliest texts describing yoga-practices is unclear, varyingly credited to Upanishads. The "Yoga Sutras of Patanjali" date from the first half of the 1st millennium CE, but only gained prominence in the West in the 20th century. Hatha yoga texts emerged sometimes between the 9th and 11th century with origins in tantra.
Yoga
This is the doctrine of the three missing things.
Even if a person knows the way of wisdom;
without practicing there is no realization.
Even if a master shows you the way,
you have to go it by yourself.
The five spiritual ways
I practice the path of self-discipline.
I meditate every day.
I go the way of embracing love.
I work as a mother and father of all beings.
I do the deity yoga.
I visualize