Effects of Self-Administered Proprioceptive Neuromuscular Facilitation Stretching on Neck and Shoulder Discomfort and Muscle Tone in Young Adult Smartphone Users

Status

Recruiting

Phases

Phase 3

Study type

Interventional

Source

TCTR

Registry ID

TCTR20251226004

Enrollment

Registered

2025-12-26

Start date

2026-01-07

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy young adults aged 18 to 25 years, with no acute or chronic musculoskeletal disorders and no discomfort in the neck and shoulder region Smartphone, PNF, Discomfort, Muscle tone

Interventions

During the break period, participants will perform neck and shoulder stretching using a standardized static stretching protocol (35-second hold, repeated twice, with a 10-second rest between repetitio

Experimental Other,Active Comparator Other

Static stretching ,Proprioceptive neuromuscular facilitation

Eligibility

Sex/Gender

All

Age

18 Years to 25 Years

Inclusion criteria

Inclusion criteria: Inclusion criteria was1, Participant aged range 18 to 25 years. 2, Participants who use a smartphone or tablet at least 2 days per week for at least 2 hours per day. 3, Participants with no acute or chronic musculoskeletal disorders.4, Participants reporting no discomfort in the neck and shoulder region (discomfort score = 0). 5, Participants with a normal BMI (18.5 to 22.9 kg/m2) and normal or corrected to normal vision (using eyeglasses or contact lenses).

Exclusion criteria

Exclusion criteria: Exclusion criteria were 1, Participants who have taken analgesic or muscle relaxant medications within 24 hours prior to the study. 2, Participants who have experienced neck or shoulder pain within the past week that required treatment by a medical doctor or physical therapist. 3, Participants who have any neurological disorders (e.g., stroke). 4, Participants who have a history of orthopedic surgery involving the spine, hip, shoulder, or arm. 5, Participants who present with spinal scoliosis or forward head posture with rounded shoulders.

Design outcomes

Primary

Measure	Time frame
Discomfort score Post 20-min smartphone use, Post intervention, Post 20-min smartphone use after intervention Numeric Rating Scale	—

Secondary

Measure	Time frame
Muscle tone Post 20-min smartphone use, Post intervention, Post 20-min smartphone use after intervention MyotonPRO	—

Countries

Thailand

Contacts

Public ContactPhinya Pupapassiri

Faculty of Allied Health Sciences, Chulalongkorn university

phinya.bua@gmail.com0863620622

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026