This study aims to compare the effects of two different chiropractic techniques, Diversified and Drop Table, on pain levels, cervical joint range of motion, and neck muscle strength in individuals with non-specific neck pain.

This randomized controlled trial aims to compare the effectiveness of two chiropractic techniques - the Diversified Technique and the Drop Table Technique - in individuals with mechanical neck pain. Mechanical neck pain is a common musculoskeletal condition associated with impaired cervical mobility, pain, and reduced quality of life.

Participants will be randomly assigned to one of three arms: (1) Diversified Technique group, (2) Drop Table Technique group, and (3) control group with no intervention. The interventions will be administered twice per week for four weeks by a chiropractor following standardized protocols. All participants will undergo evaluations at baseline and at the end of the 4-week intervention period.

The primary outcome measure is pain intensity and quality, assessed using the full version of the McGill Pain Questionnaire (MPQ), which evaluates sensory, affective, and evaluative components of pain. Secondary outcomes include cervical range of motion (CROM) and isometric neck muscle strength, measured with a goniometer and handheld dynamometer, respectively.

This study seeks to provide evidence on the comparative clinical effectiveness of two widely used chiropractic techniques for neck pain management. The findings may guide clinicians in selecting appropriate manual therapy approaches for patients with non-specific mechanical neck pain.

Inclusion Criteria:

• Sign a voluntary informed consent form.
• Be between 18 and 65 years of age.
• Have previously consulted an orthopedist or physical therapist for neck pain.
• Have no contraindications to chiropractic interventions.
• Have no history of cervical surgery.
• Report neck pain lasting longer than 7 days.

Exclusion Criteria:

• Are under 18 or over 65 years of age.
• Have experienced cervical trauma within the last month.
• Have any systemic illness.
• Have any contraindication for chiropractic intervention (e.g., brain tumor, cervical fracture).

This study is designed as a double-blind, randomized controlled trial involving three groups: the Diversified technique group, the Drop Table application group, and a control group. Although the nature of manual therapy prevents complete blinding of participants, all were only informed that they would receive chiropractic care, without specifying the technique applied. Thus, participants were blinded to the specific intervention type. The practitioners administering the treatments were not blinded due to the need to apply the appropriate technique. However, all outcome assessments were performed by an independent evaluator who was blinded to group allocation and not involved in the intervention process, ensuring objective measurement.