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Tension-type headache (TTH) is the most prevalent headache in the general population. Neck muscles are tense and tender and pain in shoulder muscles is a pronounced complaint. Several studies have found that the trapezius play a major role in TTH and decreased strength capacity and lowered activity of the painful trapezius muscle by office workers with trapezius myalgia are reported.

Does tension-type headache patients have a reduced shoulder muscle strength compared to healthy controls?