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المستخلص Soft-tissue manual therapy using mechanical devices has been used recently by clinicians in treating many musculoskeletal disorders. Yet, it is not used in the tension-type headache (TTH). Purposes: To compare the effectiveness of instrument-assisted soft tissue mobilization (IASTM) and pressure algometry with sham ultrasound US (control group) on the clinical measures of headache, pressure pain threshold (PPT), and cervical alignment in patients with TTH. Methods: Seventy-two patients with TTH of both genders were randomly allocated to 3 experimental groups: a) the IASTM group (n=24) Mean±SD of age was 41.3±7.7 years and BMI was 23.6±1.4 Kg/m2, b) pressure algometry group (n=24) Mean±SD of age was 43±5.8 years and BMI was23.7±1.2 Kg/m2 and c) sham US group (n=24) Mean±SD of age was39±6.6 years and BMI was23.7±1.3 Kg/m2,12 session for every patient ,2 session per week. Headache frequency and disability, pain pressure sensitivity of upper trapezius and suboccipital muscles, cervical lordosis, and anterior head translation were measured before and after intervention. Moreover, headache frequency was followed up for two more weeks after intervention. Results: Statistically significant improvements (P <0.05) were obtained in all outcome measures following IASTM compared to the other 2 intervention methods. The pressure algometry group showed a statistically significant lower headache frequency after follow-up (P < 0.01) than the sham ultrasound group. Moreover, the parameters of cervical alignment(cervical lordotic angle and anterior head translation) improved a statistically significant in the pressure algometry group compared to the sham ultrasound group (P < 0.05). Conclusion: The results of the present study indicate the effectiveness of IASTM in improving headache symptoms and cervical alignment in TTH patients. The use of mechanical interventions with manual therapy techniques may provide avenue to help clinicians in treating musculoskeletal disorders |