Effect of neck Exercise on sitting posture in patients with chronic neck pain. 
Physical Therapy; Apr 2007, Volume 87, Nr 4

The results of this study demonstrated that subjects with chronic non-severe neck pain had a reduced ability to maintain an upright neutral posture when distracted by a computer task. Moreover, exercise targeted at training the craniocervical flexor muscles improved the ability to maintain an upright cervical posture during this task.

An endurance-strength training regime is effective in reducing myoelectric manifestations of cervical flexor muscle fatigue in females with chronic neck pain.  Clinical Neurophysiology 117 (2006) 828-837.
The study demonstrated that an endurance-strength exercise regime for the cervical flexor muscles is effective in reducing myoelectric manifestation of sternocleidomastoid and anterior scalene muscle fatigue as well as increasing cervical flexion strength in a group of female patients with chronic neck pain.

The effect of regular exercise on absenteeism due to illness. Results of an intervention study. Implemented in 1997. Published in a special issue of Fysioterapeuten, December 2001.

 

33 employees of two Norwegian industrial enterprises with neck, shoulder and back problems reduced their specific absenteeism by a total of 558 days, i.e. 14.7 days per man-year, which amounted to 80% of the absenteeism due to musculoskeletal ailments. Total absenteeism was reduced by 437 days, i.e. 11.5 days per man-year. This reduction was sustained the year after the intervention.
The article is available in Norwegian, only.

Musculoskeletal disorders and physical activity. Results of a long-term study. Initiated in 1993, published in Tidsskriftet for Den norske Lægeforening (Journal of the Norwegian Medical Association) 1997, 29: 4258-61.

 

42 employees of two Norwegian industrial enterprises with neck, shoulder and back problems reduced their absenteeism due to illness by a total of 462 days, i.e. 11 days per person, which came to over 80% of the absenteeism due to musculoskeletal ailments.
This study was mentioned in an editorial in Fysioterapeuten, June 7, 1977, with the title “Liten innsats, stor gevinst”(“Small effort, big gain”).

A comparison of symptomatic and asympomatic office workers performing monotonous keyboard work – 1: Neck and Shoulder muscle recruitment patterns. Manual Therapy 10 (2005) 270-280
The study concludes that altered muscle recruitment strategy exists in the neck and shoulders among symptomatic and asymptomatic subjects performing stationary PC-related work.