Musculoskeletal disorders comprise one of most common and costly public health problems in the present times. Epidemiologic research has provided evidence for a relationship between development of musculoskeletal disorders and physical workplace factors such as repetitive work tasks, static contractions, and tiring postures (National Research Council and Institute of medicine, 2001). Neck/shoulder pain is widespread among office workers with intensive computer use (Jensen, 2003, Juul-Kristensen et al., 2004,IJmker et al., 2006). Trapezius myalgia – chronic pain from the upper trapezius muscle – is the most frequent type of neck pain in this occupational group (Juul- Kristensen et al., 2006). Maximal muscle strength is generally impaired in many different types of neck/shoulder pain.
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