I recently had some medical discussions with my Deep Tissue person (who has medical credentials that would allow him to be a PA (Physician Assistant) and several doctors.
The topic was size/length of your neck. I have want is considered a Short neck. Its not the actual length, but how is proportionally with the rest of your body.
Short necks are known to give those people are more difficult time with Discs and Muscles.
Those that have Long necks can have the same problems as those with short necks.
The best neck to have is a Medium neck.
I wish I had the actual sizes (inches) to illustrate this more. Much of it has to do with the way your neck can support your head.
Overall, everyone said that if you have a Short or Long neck, you will need to exercise and strengthen your neck more to properly support your head.
When I get more information about this, I will post it here.
I just found to be very interesting
Ron DiLauro Spine-Health System Administrator I am not a medical professional. I comment on personal experiences