Persisting musculoskeletal pain is common
in society. 70 - 85 % of all people have low-back
pain at some time in their life. The annual
prevalence of back pain in general ranges from 15
to 45 % with point prevalence averaging 45 % [1].
Neck and shoulder disorders are prevalent among
both women and men. It has been reported that the
prevalence of neck or shoulder pain in office
workers is much higher than in the general
population [2,3]. Previous studies showed that one