The goal of this clinical trial is to evaluate the effectiveness of TECAR therapy in improving pain intensity, cervical range of motion, and functional disability in individuals with mechanical neck pain. It will also assess whether TECAR therapy provides additional clinical benefits compared with conventional physical therapy treatment. The main questions it aims to answer are:

• Does TECAR therapy reduce pain intensity in patients with mechanical neck pain?
• Does TECAR therapy improve cervical range of motion (CROM)?
• Does TECAR therapy reduce functional disability as measured by the Neck Disability Index (NDI)? Researchers will compare participants receiving TECAR therapy combined with conventional physical therapy to participants receiving conventional physical therapy alone to determine the effectiveness of TECAR therapy in managing mechanical neck pain.

Participants will:

• Attend scheduled treatment sessions during the study period
• Receive either TECAR therapy with conventional physical therapy or conventional physical therapy alone
• Undergo assessment of pain intensity, cervical range of motion, and neck disability before and after treatment

Mechanical neck pain is one of the most common musculoskeletal disorders and is frequently associated with pain, restricted cervical mobility, and reduced functional performance, which may negatively affect daily activities and quality of life. Conventional physical therapy interventions are commonly used to manage mechanical neck pain; however, interest has recently increased in the use of TECAR therapy as a non-invasive modality that may enhance tissue healing, improve circulation, reduce pain, and restore function.

This single-blind randomized controlled trial aims to investigate the clinical effectiveness of TECAR therapy in individuals with mechanical neck pain. Participants who meet the eligibility criteria will be randomly assigned to either an experimental group receiving TECAR therapy in combination with conventional physical therapy or a control group receiving conventional physical therapy alone.

Outcome measures will be assessed before and after the intervention period and will include pain intensity, cervical range of motion (CROM), and functional disability using the Neck Disability Index (NDI). The study seeks to determine whether adding TECAR therapy to a conventional rehabilitation program provides superior improvements in pain reduction, cervical mobility, and functional outcomes in patients with mechanical neck pain.

Inclusion Criteria:

• Presence of neck pain for at least 3 months
• Limited cervical range of motion associated with neck pain
• Ability to understand and follow study instructions Willingness to participate and sign the informed consent form

Exclusion Criteria:

• History of cervical spine surgery or fracture
• Cervical radiculopathy or other neurological disorders
• Presence of inflammatory, rheumatic, or systemic diseases affecting the cervical spine

Severe cervical disc prolapse or spinal instability Current participation in another treatment program for neck pain Pregnancy Presence of pacemakers, metal implants, or contraindications to TECAR therapy Skin disorders or open wounds in the treatment area