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The appropriated neck posture for neck and shoulder muscle activities during smartphone using in standing posture

The appropriated neck posture for neck and shoulder muscle activities during smartphone using in standing posture

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
TCTR
Registry ID
TCTR20190703001
Enrollment
32
Registered
2019-07-03
Start date
2019-04-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy subject Smartphone Muscle activity Kinematic Standing Neck

Interventions

all subjects will be assessed muscle activity and kinematic four different neck flexion angle during smartphone using in standing posture
Diagnostic
Experiment group

Sponsors

Research Center in Back, Neck, Other Joint Pain and Human Performance, Khon Kaen University
Lead Sponsor
Research Center in Back&#44
Collaborator
Neck&#44
Collaborator
Other Joint Pain and Human Performance&#44
Collaborator
Khon Kaen University
Collaborator

Eligibility

Sex/Gender
All
Age
18 Years to 25 Years

Inclusion criteria

Inclusion criteria: 1.They are healthy young adult aged between 18-25 years (Gustafsson E et al., 2011). 2.They have at least 6 month’s experience in smartphone using (Xie Y et al., 2016). 3.They use of their smartphone daily at least 2 hours per day (Xie Y et al., 2016). 4.They are right hand dominant and prefer to use dual handed text entry.

Exclusion criteria

Exclusion criteria: 1.They have any history of traumatic injuries or surgical interventions of relevant regions within the past year (Kim GY, Ahn CS, Jeon HW, & Lee CR, 2013; Kim MS, 2015; Xie Y et al., 2016). 2.They have chronic diseases affecting musculoskeletal systems such as rheumatoid arthritis, osteoarthritis and other connective tissue disorders (Kim MS, 2015; Xie Y et al., 2016). 3.They have visual problems, which cannot be corrected by glasses, dizziness, and vertigo (Kim GY et al., 2013). 4.They had taken any sedative drug or alcohol within the past 48 hours (Kim GY et al., 2013).

Design outcomes

Primary

MeasureTime frame
Neck and shoulder muscle activity 2 minutes during smartphone texting Surface electromyography,Neck and shoulder kinematic 2 minutes during smartphone texting 2D video recording and digitizing by Kinovea software—

Secondary

MeasureTime frame
Neck discomfort score end of 2 minutes during smartphone texting scoring on visual analogue scale (VAS)—

Countries

Thailand

Contacts

Public ContactWeerasak Tapanya

Research Center in Back, Neck, Other Joint Pain and Human Performance, Khon Kaen University,

wee_pt2nu@hotmail.com0869236141

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026