Muscle Strength in Shoulder and Neck Muscles in Tension Type Headache Patients. Effect of Specific Strength Training

Inclusion Criteria: * Tension-type headache(TTH), inclusion criteria were age between 18 and 65 years and for patients a diagnosis of TTH ≥8 headache days per month, and ≤3 migraine days per month according to ICHD-II -criteria. Exclusion Criteria: * Exclusion criteria were medication overuse headache (ICHD-II), previous whiplash or head trauma, other major physical or neurological diseases, depression, other mental illness, or being unable to understand and speak Danish. The patients were tested for cervicogenic headache according to Jull, et al 2007, and were excluded if the test was positive.