Cervical muscle fatigue. Occupational exposure to risk factors
Conditions
Interventions
Intervention 1: Control group: Participants text with a smartphone for 15 minutes, then they rest for 1 minute, afterwards they continue the task for 15 minutes. Intervention 2: First intervention gro
Sponsors
Tehran University of Medical Sciences
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Inclusion criteria
Inclusion criteria: Using smartphone Right handed Neck disability index lower than 10 percent or 5 score 18-40 years old
Exclusion criteria
Exclusion criteria: Neck or shoulder pain problem Upper extremity radicular pain Upper extremity numbness History of chronic neck, sholder, back or leg pain Auditory disorders Eye disoders including ocular surface disorder and computer vision syndrome Visual weakness
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Fluctuation slope of median frequency. Timepoint: Beginning the task and every 2 minutes. Method of measurement: Surface electromyography.;Fluctuation slope of root mean square. Timepoint: Beginning the task and every 2 minutes. Method of measurement: Surface electromyography. | — |
Secondary
| Measure | Time frame |
|---|---|
| Type of muscle performance. Timepoint: Beginning the task and every 2 minutes. Method of measurement: Surface electromyography instrument and Joint Analysis of Spectrum and Amplitude.;Neck disability index. Timepoint: Before and after doing the task. Method of measurement: Persian neck disability index questionaire.;Numeric rating scale. Timepoint: Before and after doing the task. Method of measurement: Numeric Rating Scale questionaire.;Neck flexion angle. Timepoint: Every 2 minutes. Method of measurement: Imaging and measuring the angle by Kinovea software.;Head flexion angle. Timepoint: Every 2 minutes. Method of measurement: Imaging and measuring the angle by Kinovea software. | — |
Countries
Iran (Islamic Republic of)
Contacts
Public ContactEhsan Naeimi
Tehran University of Medical Sciences
Outcome results
None listed