Investigation of the Relationship of Smartphone Use Time With Neck Endurance, Head Posture, Lateral Grip Strength, Hand Grip Strength and Postural Control Parameters in Young Adults

In the planned study, young adults between the ages of 18-35 with different phone usage durations will be evaluated. The aim of the study is to investigate whether the average daily phone usage time has a direct relationship with neck muscle endurance, rough grip strength, lateral grip strength and head posture, and whether there is an indirect relationship with postural control. People who have phones with IOS 12 or Android 9 and above will be invited to the study. By looking at the screen time tracking feature in these versions, the daily phone usage hour for the last week will be calculated and the participants will be divided into two groups as the daily phone usage average of 5, and below and 5 hours. In the planned study, neck endurance will be tested on flexor and extensor muscle groups in accordance with the literature. The lateral flexion and anterior tilt angles will be calculated with two photographs taken from the anterior and lateral sides of the head posture of the person's shoulder, and the hand grip strength will be measured with a Jamar hand dynamometer and the lateral grip strength will be measured with a pinchmeter. Postural control evaluation will be measured by means of center of pressure-CoP parameters measured with TekScan brand pressure platform. The study is planned to be carried out in the Movement Analysis Laboratory of the Faculty of Physical Therapy and Rehabilitation of Dokuz Eylul University. Participants will be selected from healthy adults between the ages of 18-35 who volunteered to participate in the study among the students of the Faculty of Physical Therapy and Rehabilitation, their relatives and the relatives of the researcher. The study is planned to be completed within 6 months following ethical approval.

Study Overview

• Status: Recruiting
• Conditions: Cell Phone Use
• Intervention / Treatment: Other: phone use

• Study Type: Observational
• Enrollment (Estimated): 120

Contacts and Locations

• Study Contact: Name: Zeynep SAĞ; Phone Number: +905065829407; Email: fzt.zeynep.sag@gmail.com

Study Locations

• Turkey
  • Balçova
    • İzmir, Balçova, Turkey, 35330
      • Recruiting
      • Dokuz Eylül Univercity
      • Contact: İbrahim Engin Şimşek, Professor; Phone Number: +905323476148; Email: iengin.simsek@gmail.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Probability Sample

Study Population

healthy young adults

Description

Inclusion Criteria:

• Using a phone with IOS 12 or android 9 and above for at least one week

Exclusion Criteria:

• Presence of orthopedic surgery in the last 6 months
• Those who have a disease or take medication that will prevent neuromuscular system and postural control measurements
• have neck pain

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
over 5 hours; people with an average daily phone use of more than 5 hours.	Other: phone use; There is no intervention.
under 5 hours; People with an average daily phone use of less than 5 hours.	Other: phone use; There is no intervention.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
postural control parameters	Postural control can be quantitatively assessed by examining the behavior of the statically or dynamically in the lower pressure center (CoP).	up to 8 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
hand grip strength	hand grip is the numerical output of the brute grip strength of the hand	up to 8 weeks
lateral grip strength	The lateral grip is a numerical measurement of the maximum strength of the thumb abductor muscles, which we do not use especially during texting.	up to 8 weeks
neck muscle endurance	neck muscle endurance is the numerical data of the endurance of the neck flexor and extensor muscles	up to 8 weeks

Collaborators and Investigators

• Sponsor: Dokuz Eylul University

Study record dates

Study Major Dates

• Study Start (Actual): March 14, 2023
• Primary Completion (Actual): June 20, 2023
• Study Completion (Estimated): March 14, 2024

Study Registration Dates

• First Submitted: March 23, 2023
• First Submitted That Met QC Criteria: April 5, 2023
• First Posted (Actual): April 18, 2023

Study Record Updates

• Last Update Posted (Actual): September 7, 2023
• Last Update Submitted That Met QC Criteria: September 5, 2023
• Last Verified: September 1, 2023

More Information

Terms related to this study

• Keywords: Balance; CoP; forehead posture
• Other Study ID Numbers: 2023/03-14

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No