I read few short books by J. Krishnamurti when I was a teenager.
More than 20 years later, Youtube offers me this clip:
J. Krishnamurti said, the exercises that are called Yoga were developed between the 17th and 18th century, and do not develop any spiritual power, only good health.
Eylon: becoming a pretzel doesn't make you more receptive.
so just breathe, smile and develop a spine.