Table 1. Inclusion and exclusion criteria

	UT pain group	Control group
Inclusion	- Sustained and repeated pain in the UT over 3 months- Tightness and palpable tender spots in the UT- VAS rating of the UT of > 3 cm- PPT < 2.9 kg/cm2 in males   < 2.0 kg/cm2 in females	- No pain in the UT for at least 3 months- No tightness or palpable tender spots in the UT- Pain VAS rating of the UT = 0 cm- PPT ≥ 2.9 kg/cm2 in males   ≥ 2.0 kg/cm2 in females.
Exclusion	- A previous life-threatening disease- Whiplash- Trauma- Arthritis in the neck or shoulder- Diagnosis of shoulder impingement syndrome

UT pain, upper trapezius pain; VAS, visual analog scale; PPT, pressure pain threshold.