Early I published an article that told you how to protect your neck when doing Pashimottanasana by avoiding the turtle effect.
Here is a brief excerpt
Avoid bringing your shoulders up to your ears like this turtle.
Bob is struggling to reach his feet in Pashimottasana. Bob’s head has almost disappeared into his shoulders. He has lifted his shoulder blades a long way up towards his ears in his attempt to reach his feet with his hands. He looks an awful lot like a turtle.
Later Bob is complaining about how sore his neck and upper back are. There are a couple of things that Bob can do to avoid the turtle effect and enjoy Pashimottasana more.
To find out how Bob avoided the turtle effect watch the video below.
If you wish you can watch it directly on YouTube by following this link http://www.youtube.com/watch?v=AAugDrIcUFQ
