Posture affects our necks negatively when there is anterior or posterior pelvic tilt because the spinal curves are altered and the head is carried in a forward position. The muscle at the front of the neck, the Sternocleidomastoideus (SCM) shortens and the shoulder girdle rounds and shifts forward, exaggerating the curvature of the upper back. In some people, the upper back remains relatively straight and the lower cervical curve reverses. Both of these neck positions cause pain in the upper back and neck.
Another factor in shortening of the SCM is crunch-style abdominal exercise: the neck is strengthened in an inappropriate anatomical position -which is going to persist when you stand upright. Please refer below to Mid-back Pain for more detail on the negative effect of abdominal isolation exercises. Abdominal exercise also strengthens and tightens the hip flexors, mainly the Psoas. A tight Psoas also causes a tight neck.
Pain and tightness on one side of the neck is sometimes related to the hip as well; a difference in leg-length or weakness of hip muscles causes the pelvis to tilt sideways and a correction will occur in the neck, in order to keep the head horizontal and preserve balance, resulting in strain on one side. One-sided neck pain and stiffness needs assessment and treatment by a Chiropractor.
Yogis should be aware that their practice can have a negative effect on their posture, postural problems such as the ones described are correctable with exercises prescribed by a movement specialist, and they can also be created by unbalanced posture sequencing, or incorrect movement habits, for example: habitually moving in anterior pelvic tilt – a very common habit that teachers need to correct when they see.
Reading sources: Sharkey, 2008, The Concise Book of Neuromuscular Techniques De Franca, 1996, Pelvic Locomotor Dysfunction
Mid-back Pain and Abdominal Strenghthening
There are 2 reasons why this occurs:
- abdominal muscles oppose spinal muscles: the spine creates extension and the abdominals create flexion and they should be strengthened in equal amounts, whereas many teachers will do 5 or 10 minutes of ab-exercise but no Salabhasana or any of its variants in a class. An imbalance between the front and the back of the body develops and the back pain experienced is caused by the spinal muscles working overtime to try and keep the spine extending upwards, as abdominal muscles pull it down into flexion
- the types of abdominal exercises: mostly, some type of abdominal crunching is used, and students are told to lift their shoulders off of the mat. This position makes the muscles at the front of the neck strong and shorter and pulls the head forwards. Strong and tight abdominal muscles in the solar plexus area have a profound effect on the posture because the shoulders are pulled forwards, rounding the upper back and causing pain
Core body strength is necessary for a safe yoga practise but it may be helpful to explore other ways of doing this: Navasana, Parvritta Navasana, Purvottanasana, Vasistasana, Anantasana, Astavakrasana, Bakasana, Parvritta Bakasana, Jathara Parivatarasana, Urdhva Prasarita Padasana, to name a few.
Reading sources: Sharkey, 2008, The Concise Book of Neuromuscular Therapy Kendall, McCreary, Provance, 1993, Muscles, Testing and Function Cook, 2003, Athletic Body in Balance Boyle, 2004, Functional Training for Sports BKS Iyengar, 1966, Light on Yoga