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ARTICLE TYPE : RESEARCH ARTICLE

Published on :   24 Oct 2026, Volume - 2
Journal Title :   WebLog Journal of Physical Medicine | WebLog J Phys Med | WJPM
Source URL:   weblog icon https://weblogoa.com/articles/wjpm.2026.j2404
Permanent Identifier (DOI) :   doi icon https://doi.org/10.5281/zenodo.23879330

Smartphonopathic Hand: An Observational Study on the Relationship Between Smartphone Addiction and Hand Muscle Function in Young Adults

Sumedha Govindaswamy 1 *
Alva Sonalica Jeeya Sunil 2
Tuniya Kashish Pradeep 2
Nikita Majumder 2
Chinmayi Rangaraju 3
1MPT in Musculoskeletal and Sports Physiotherapy, Assistant Professor, Acharya's NR Institute of Physiotherapy, Acharya Institutes, Soldevanahalli, Bengaluru, Karnataka, India
2BPT, Acharya's NR Institute of Physiotherapy, Acharya Institutes, Soldevanahalli, Bengaluru, Karnataka, India
3MPT in Neurological Sciences, Assistant Professor, Acharya's NR Institute of Physiotherapy, Acharya Institutes, Soldevanahalli, Bengaluru, Karnataka, India

Abstract

Background: Heavy, repetitive smartphone use puts ongoing mechanical stress on the upper limb, but little research has jointly examined how compulsive phone use and total screen exposure connect to hand strength and to how freely the wrist muscles move.

Objective: To determine whether being addicted to a smartphone, and how many hours a person spends on it each day, correspond to measurable differences in hand strength and wrist muscle flexibility in a young-adult population.

Methods: A sample of 156 students, ages 18 to 25, was drawn by convenience sampling from Acharya Institutes in Bengaluru, India. Each completed the Smartphone Addiction Scale-Short Version (SAS-SV) questionnaire and recalled their total screen time from the prior day. Investigator then measured hand strength and wrist muscle flexibility, and these outcomes were compared against SAS-SV results.

Results: The typical participant was 21 years old with a BMI near 21.4 and logged close to five hours of screen time a day. There was no notable link between SAS-SV scores and hand or wrist strength. Screen time, on the other hand, tracked with muscle-flexibility outcomes: 44% of the group tested positive for shortened wrist-extensor muscles.

Conclusion: More screen time per day corresponded with a higher chance of a positive wrist muscle-length test, while addiction severity did not predict either strength or flexibility outcomes.

Keywords: Smartphone Addiction; Screen Time; Grip Strength; Pinch Strength; Wrist Muscle Length; Young Adults

Citation

Govindaswamy S, Sonalica Jeeya Sunil A, Kashish Pradeep T, Majumder N , Rangaraju C. Smartphonopathic Hand: An Observational Study on the Relationship Between Smartphone Addiction and Hand Muscle Function in Young Adults. WebLog J Phys Med. wjpm.2026.j2404. https://doi.org/10.5281/zenodo.23879330
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