NCT07487922

Examining the Effects of Fatigue According to Nomophobia Level

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 90 (actual)
• Sponsor: Inonu University · Academic / Other
• Sex: All
• Age: 18 Years – 25 Years
• Healthy volunteers: Accepted

Summary

The aim of this study is to examine, using a comparative and experimental approach, the effects of nomophobia (fear of being without a smartphone) levels on acute neuromuscular and cognitive fatigue susceptibility induced by a standard physical exertion in young adults.

Detailed description

This project aims to fill a significant gap in the literature by examining the effects of Nomophobia (No Mobile Phone Phobia), one of the rapidly increasing behavioral problems of the digital age, on cognitive performance and the neuromuscular system through objective physiological measurements. Nomophobia is increasing, especially among young adults, with the widespread use of smartphones; it is closely associated with high anxiety, distractibility, and stress levels . Studies in the literature have reported significant correlations (r ≈ 0.45) between Nomophobia and stress. However, the vast majority of these studies are based on subjective scales and do not provide objective data that directly examine neuromuscular and physiological effects. Therefore, the somatic reflections of psychological stress related to Nomophobia on muscle mechanics and cognitive resilience have not been sufficiently explained. Smartphone users, particularly those in their adolescence and twenties, are at higher risk for musculoskeletal disorders due to prolonged and repetitive static positions. This leads to fatigue and pain in the neck (Sternocleidomastoid - SCM, Upper Trapezius), upper extremity (Flexor Carpi Radialis - FCR), and trunk (Lumbar Erector Spinae - LES, Rectus Abdominis) muscles This project will objectively evaluate the effects of nomophobia-induced psychological stress on two key physiological domains to demonstrate its amplifying effect on this pre-existing physiological sensitivity: Cognitive Performance: Examining the prolongation of Reaction Time (RT) in attention-demanding tasks after acute physical exertion in individuals with high levels of nomophobia. Cognitive performance will be assessed using the Nelson Hand Reaction Time Test (Simple Reaction Time - SRT), which measures the speed of a participant's hand motor response to a visual stimulus in milliseconds (ms). Neuromuscular Response: Assessment of stiffness (ΔStiffness) and mechanical recovery rate (ΔDecrement) in postural (SCM, Upper Trapezius, LES) and functional (FCR, Rectus Abdominis) muscles as measured by MyotonPRO. Physiological Cost: Determination of resistance sensitivity to fatigue through comparison of Core Endurance Time (seconds) achieved in maximal plank exercise . In this respect, the project aims to demonstrate with scientific evidence that Nomophobia is not only a psychological condition but also a systemic stress factor that increases cognitive and neuromuscular sensitivity, by integrating the disciplines of behavioral psychology, physiology, and biomechanics. Research Question: Are young adults with high levels of Nomophobia more susceptible to cognitive and neuromuscular fatigue after acute physical exertion compared to those with low levels? Key Hypotheses: Individuals with high levels of Nomophobia will have a significantly higher percentage increase in Reaction Time (RT) after acute exertion. Increased stiffness (ΔStiffness) and loss of elasticity (ΔDecrement) in postural and functional muscles will be more pronounced after the maximal plank test. Individuals with high levels of Nomophobia will have a significantly shorter endurance time (seconds) in the Maximal Plank Position Endurance Test. Expected Outcome: These findings will provide unique and objective evidence regarding the effects of technological addiction on neuromuscular health, demonstrating that individuals with high levels of nomophobia are more susceptible to both cognitive and physiological burnout.

Conditions

• Smartphone Addictions

Interventions

Type	Name	Description
OTHER	Fatigue Induction Procedure	• Maximal Plank Position Endurance Test: Physical fatigue will be induced using the standardized Plank Position Endurance Test (Axler \& McGill, 1997), which tests maximal endurance in the abdominal and trunk stabilizer muscles. • Position: The participant stands on their forearms and toes, keeping their body in a straight line from head to toe. Elbows are placed just below the shoulder joint. Abdominal and hip muscles are actively contracted. • Procedure: The participant is asked to maintain the position in correct form for as long as possible, upon the researcher's "Start" command. The timer is started at the beginning of the position. • Termination Criteria: The test is terminated when any of the following conditions occur, and this time (in seconds) is recorded: * The lower back begins to sag, disrupting the straightness of the back (excessive increase in lordosis). * The hips rise more than 90 degrees upwards. The part

Timeline

• Start date: 2026-03-01
• Primary completion: 2026-03-10
• Completion: 2026-03-11
• First posted: 2026-03-23
• Last updated: 2026-03-23

Locations

1 site across 1 country: Turkey (Türkiye)