Not knowing the bone structure of your body and how it can limit movement can cause discomfort or harm to your body
How is that possible:
.. it can lead to injuries during your practice, as you might try to pretzel yourself into a posture, that your body is simply not designed to do (this is not about flexibility, but bones!)
After 30 years, my bridge (chakrasana) still looks like a squashed 'U'!
Because the acromion bone in my shoulder will not allow my arms to go far back enough to make that 'pretty U' shape, and because I will not compress my lower back to make up for that. If you don't know that, you will push your lower back WAAAAYYY to far.. get to 50 years old and have a word with your spine then...
... Or imagine you are constantly rubbing your hip joint sockets by pushing your legs too far for your body ... might that wear down the bones in your Hip joints over the years? ABSOLUTELY!
... if you squish your disks between your vertebrae of your spine with every single movement (as most yogis do - yes, even teachers), could that cause damage to the disks?
RIGHT IT CAN!
This is not a joke. I have worked with countless students that have had injuries from their yogic practice because they did not know this. That includes myself! Not knowing what I was doing before gave me serious SI joint issues. I still have to have constant awareness of that so that it doesn't flare up again.
The proportions of your body can change the way you can do, or look in a posture
How is that possible:
... Imagine two people are doing a standing forward bend... one has really long legs the other has short legs .... who will have it easier to touch their feet? Does that have to do with yogic 'accomplishment' or flexibility, or simply with proportions of the body?
I have yet to meet a Yogi who has experienced a truly open body in an asana
What does that mean?
Most of the time yogis crunch one side of the body to open another...
-> The MYTH OF THE COUTERSTRETCH...
No matter how much you counterstretch
One side will always be crunched!
It's often not comfortable and more than likely means that energy lines are as much 'squished' as the lungs and spine... bye bye prana, kundalini and spinal disks...
Can you sit comfortably for 1/2 hour or more crosslegged?
If not, you haven't learned how to!