Asana (postures) and movement you do in yoga class is one of Eight aspects or limbs of yoga: I wrote another blog which is an article to introduce you to the 8 Limbs of Yoga.
Asana is only the tip of the Iceberg,
The best benefits of yoga cannot be seen with the physical eyes. The best benefits can’t be seen in any picture! And real benefits of yoga began with-in the first weeks of daily practice!
For example, this pose took me over 5 years of daily practice, as well as 45 minutes warming up to do for this photo. What is the greatest benefit is beyond words and is related to many benefits through the practice