Trial reportInternational journal of environmental research and public health2025
Differences in Posture, Neck Angle, and Body Discomfort During Various Electronic Device Usage with Virtual Classroom.
Trial report in International journal of environmental research and public health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Associations of smartphone addiction and physical activity with sleep quality and neck/shoulder symptoms in university students: a cross-sectional study.Frontiers in public health · 2026Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundProlonged use of electronic devices in virtual classrooms can influence posture, neck angle, and body discomfort. Recent evidence suggests that not only "incorrect" postures but also sustained static positions, regardless of being ergonomically correct, contribute to musculoskeletal strain. However, limited studies have directly compared posture and discomfort across different types of devices in a virtual classroom setting.
objectiveTo evaluate differences in posture, neck angle, and body discomfort among female university students during the use of three electronic devices (smartphone, tablet, notebook) in a virtual classroom for 20 min.
methodsTwenty-four healthy female participants (aged 18-23 years) completed three randomized sessions using a smartphone, tablet, or notebook in a virtual classroom task. Posture was assessed using the Rapid Upper Limb Assessment (RULA), neck angle was measured via motion analysis, and body discomfort was rated with a standardized visual analog scale. Statistical analyses were performed using repeated-measures ANOVA with Bonferroni correction, with effect sizes reported.
resultsSignificant differences were observed in posture (RULA scores: smartphone 5.12 ± 1.26; tablet 4.62 ± 1.35; notebook 4.21 ± 1.32,
conclusionThis study demonstrates that sustained posture during virtual classroom activities leads to increased neck angle deviation and body discomfort, with device type influencing the magnitude of these effects. These findings highlight the importance of postural variability and active breaks, rather than relying solely on maintaining a "correct" posture, to reduce musculoskeletal strain in technology-based learning environments.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.