Smartphone Use and Hand Function in Young Adults

Condition(s) studied

Investigational drug(s) / intervention(s)

Assessment Protocol: All participants will undergo a standardized assessment protocol including measurement of smartphone addiction level, daily smartphone screen time from the past 7 days, dominant hand grip strength, thumb pinch strength, wrist proprioception, and thumb proprioception in a single session

Study summary

This observational cross-sectional study aims to investigate the relationship between daily smartphone usage duration and hand function parameters in young adults. Specifically, the study will examine the association between smartphone screen time and dominant hand grip strength, thumb strength, and wrist and thumb proprioception. Healthy individuals aged 18-35 years will be included. All participants will undergo a single-session assessment including measurement of smartphone usage duration, hand grip strength, pinch strength, and joint position sense of the wrist and thumb. The findings are expected to provide insight into the potential effects of prolonged smartphone use on hand function and proprioceptive performance in young adults.

Eligibility

Primary outcome measure(s)

• Hand Grip Strength — Single assessment at baseline
  Hand grip strength will be measured using a hydraulic hand dynamometer. The participant will be in a seated position with the elbow flexed at 90 degrees. Three measurements will be taken with a 10-second rest between each, and the average value will be recorded in kilograms (kg).
• Thumb Pinch Strength — Single assessment at baseline
  Thumb muscle strength will be measured using a pinchmeter. The participant will be seated with the elbow flexed at 90 degrees and the wrist in a neutral position. The average of three trials will be recorded in kilograms (kg).
• Thumb Active Joint Position Sense (JPS) — Single assessment at baseline
  Measured using a standard transparent plastic goniometer. The researcher will passively move the thumb to a 30-degree abduction target position. The participant will be asked to actively reproduce this angle. The absolute error between the target angle and the reproduced angle will be recorded in degrees.
• Wrist Joint Position Sense (JPS) — Single assessment at baseline
  Measured using a goniometer with the participant's eyes closed. The wrist will be passively moved to predetermined positions (30 degrees flexion, 30 degrees extension, 10 degrees radial deviation, and 15 degrees ulnar deviation). The participant will then actively reposition the wrist, and the absolute error will be calculated in degrees.

Trial sites (1)

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