The purpose of the study is to:

Investigate if there was effect of global postural re-education in individuals with text neck syndrome.

The Global postural reeducation (GPR) is a series of postures and gentle active movements are performed aimed at stretching shortened muscles, decompressing and aligning joints, with breath¬ing control, contractions of antagonist muscles and sen¬sory integration exercises to work on proprioceptive af¬ferents and re-educate postural control The study was testing the following null hypothesis There was no effect of Global postural in individuals with text neck syndrome.

This study was conducted in the research laboratory section, Faculty of Physical Therapy, Cairo University. The purpose of the current study was to investigate the effect of global postural reeducation on neck pain intensity, neck disability craniovertebral angle, shoulder angle, cervical range of motion, and cervical proprioception in individuals with text neck syndrome.

This study is a Pre- test post- test single blind randomized controlled trial. • Subjects' selection:

A. Participants:

1. 60 Participants from both genders diagnosed by physician as TNS
2. Their age ranging from 18-44 years old
3. Their body mass index ranging from (18-30) Kg/m2
4. Their using mobile phones for more than 3-4 hours per day was assessed by using The Arabic version of the smartphone addiction scale
5. Informed consent (Appendix I) attained from each participant after clarifying the scope and purpose of the research and ensuring them of their right to decline at any time and of the privacy of any information obtained.

B- Sample size:

The sample size was calculated using the G*Power software (version 3.0.10). F-test MANOVA within and between interaction effects was selected. Considering a power of 0.80, an α level of 0.05 (2 tailed) and effect size of 0.37; two groups and number of measurements two, a generated sample size of at least 60 subjects,30 subjects per group was required.

C. Randomization:

Concealed allocation was performed by an independent person who not involved in either recruitment or treatment of the patients. He used individually, sequentially numbered index cards containing the randomly assigned intervention groups (A and B) that folded and placed in sealed, opaque envelopes. the researcher opened the envelope before the 1st session and proceeds with the treatment on the initial examination day according to the group assignment.

D. Groups:

Participants assigned at random into 2 equal groups. Control group (A) received conventional treatment only. Experimental group (B) received Global postural reeducation in addition to conventional treatment E. Incluction critrria

1. participants aged range from 18-44 years old .
2. participants Body mass index between (18-30) Kg/m2
3. participants using mobile phones for more than 3-4 hours per day assessed by using The Arabic version of the smartphone addiction scale (short version). F. Exclusion criteria

The subject excluded if they had the following:

(1) history of neck pathology; (2) musculoskeletal disease or anomaly; (3) history of spinal or neck surgery; (4) recent surgery; (5) chronic medical illness; or (6) receipt of any treatment for the neck in the preceding three months.

Inclusion Criteria:

• The subject included if they had the following:
• diagnosed by physician as text neck syndrome
• Using mobile phones for more than 3-4 hours per day
• pain score more than 4 on the visual analog scale.

Exclusion Criteria:

• The subject excluded if they had the following:

  1. history of neck pathology; (2) musculoskeletal disease or anomaly; (3) history of spinal or neck surgery; (4) recent surgery; (5) chronic medical illness; or (6) receipt of any treatment for the neck in the preceding three months.

Randomization was performed using computer-generated numbers placed in opaque sealed envelopes. Participants were assigned to one of two groups in a 1:1 ratio. Allocation was conducted by an author not involved in data collection or treatment. To maintain allocation concealment, envelopes were opened only at the time of participant enrollment. Participants were blinded to their group allocation until study completion.²0 All participants provided written informed consent.