Basic strength training for the neck/shoulder muscles can decrease intensity of neck/shoulder pain, but it is uncertain whether training should focus directly on the upper trapezius - which is most often tender - or on the lower compartments and serratus anterior.

We hypothesize that strengthening exercise for the lower and middle trapezius as well as the serratus anterior will decrease intensity of neck/shoulder pain among office workers

Inclusion Criteria:

• employees
• more than 30 days with pain previous year
• pain intensity of at least 3 on a scale of 0-10

Exclusion Criteria:

• trauma
• life threatening disease
• pregnanacy