The goal of this observational study is to determine whether relaxation exercises performed before cranio-cervical flexion can reduce superficial neck muscle activation (specifically sternocleidomastoid and upper trapezius) in individuals with neck pain. The main questions it aims to answer are: * Does performing relaxation exercises prior to cranio-cervical flexion reduce sternocleidomastoid (SCM) muscle activation? * Does it reduce upper trapezius muscle activation during the standing? Researchers will compare the group performing relaxation exercises before cranio-cervical flexion to the group performing only cranio-cervical flexion to see if there is a measurable difference in superficial neck muscle activation. Participants will: * Perform cranio-cervical flexion exercises. * Perform relaxation exercises prior to the cranio-cervical flexion (intervention group only). * Undergo surface EMG measurements to assess muscle activity.
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Numerical Pain Rating Scale
Timeframe: At enrollment (pre-intervention) and immediately after the relaxation exercise intervention or sham intervention (Day 1)
Turkish Version of Core Outcome Measure Index for Neck Pain
Timeframe: At enrollment (pre-intervention)
EMG Activation Level of Sternocleidomastoid Muscle During Craniocervical Flexion Maneuver
Timeframe: At enrollment (pre-intervention) and immediately after the relaxation exercise intervention (Day 1)
EMG Activation Level of Upper Trapezius Muscle During Standing Still
Timeframe: At enrollment (pre-intervention) and immediately after the relaxation exercise intervention (Day 1)