An interventional study of loading conditions in Child, sponsored by University Fernando Pessoa. Completed. Open to participants aged 6 Years to 10 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-10-28.
Sponsored by University Fernando Pessoa · Not applicable, Interventional, and Basic science
The purpose of the present study is to analyze the influence of four backpack loading conditions (0, 10, 15 and 20% of body weight) on the electromyographic activity of the neck and lumbar muscles of elementary school children.
Elementary school children participated in the present study, between the ages of 6 and 10. Bilateral sternocleidomastoid, rectus abdominis and erector spinae muscles activity were recorded using surface electromyography (sEMG), while tested for the effect of four randomized backpack loading conditions.
University Fernando Pessoa is the lead sponsor of 13 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
elementary school children will be presented with different backpack loading conditions
Other: loading conditions
Different backpack loading conditions 0%, 10%, 15% and 20% allocated randomly
Muscle Activity as a Measure of Route Mean Square
EMG signals were initially filtered with a Notch Filter of 50hz, due to the DC power line, using MATLAB 7.11 (v.2010). The signal was then detrended, converted into millivolts and normalized. the normalized signal was then used to calculate the route mean square.
Time frame: one year
elementary school children, male and female, with no history of spine problems. Tutors provided legal authorization.
| Milestone | Healthy School Children |
|---|---|
| Started | 14 |
| Completed | 14 |
| Not completed | 0 |
EMG signals were initially filtered with a Notch Filter of 50hz, due to the DC power line, using MATLAB 7.11 (v.2010). The signal was then detrended, converted into millivolts and normalized. the normalized signal was then used to calculate the route mean square.
| milivolts | Healthy School Children |
|---|---|
| left lumbar erector spinae at 0% of body weight | 13.96 ± 8.45 |
| left lumbar erector spinae at 10% of body weight | 10.70 ± 7.31 |
| left lumbar erector spinae at 15% of body weight | 10.85 ± 7.47 |
| left lumbar erector spinae at 20% of body weight | 9.28 ± 5.47 |
| Right lumbar erector spinae at 0% of body weight | 13.36 ± 8.73 |
| Right lumbar erector spinae at 10% of body weight | 9.20 ± 7.47 |
| Right lumbar erector spinae at 15% of body weight | 7.19 ± 3.67 |
| Right lumbar erector spinae at 20% of body weight | 6.55 ± 2.91 |
| Left cervical erector spinae at 0% of body weight | 8.56 ± 4.41 |
| Left cervical erector spinae at 10% of body weight | 7.66 ± 2.43 |
| Left cervical erector spinae at 15% of body weight | 8.69 ± 3.15 |
| Left cervical erector spinae at 20% of body weight | 9.85 ± 4.50 |
| Right cervical erector spinae at 0% of body weight | 7.77 ± 2.89 |
| Right cervical erec spinae at 10% of body weight | 8.91 ± 3.81 |
| Right cervical erec spinae at 15% of body weight | 9.32 ± 3.28 |
| Right cervical erec spinae at 20% of body weight | 11.10 ± 3.67 |
| Left Rectus Abdominis at 0% of body weight | 3.35 ± 0.29 |
| Left Rectus Abdominis at 10% of body weight | 3.68 ± 0.60 |
| Left Rectus Abdominis at 15% of body weight | 4.27 ± 1.77 |
| Left Rectus Abdominis at 20% of body weight | 4.03 ± 1.16 |
| Right Rectus Abdominis at 0% of body weight | 3.64 ± 0.32 |
| Right Rectus Abdominis at 10% of body weight | 3.88 ± 0.29 |
| Right Rectus Abdominis at 15% of body weight | 4.94 ± 2.58 |
| Right Rectus Abdominis at 20% of body weight | 4.54 ± 1.50 |
Collected over 1 year. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Healthy School Children | 0/14 (0%) | 0/14 (0%) | 0/14 (0%) |
| Age, Categorical(Participants) | Healthy School Children |
|---|---|
| <=18 years | 14 |
| Between 18 and 65 years | 0 |
| >=65 years | 0 |
| Age, Continuous(years) | Healthy School Children |
|---|---|
| Mean | 8.93 ± 0.73 |
| Sex: Female, Male(Participants) | Healthy School Children |
|---|---|
| Female | 9 |
| Male | 5 |
| Region of Enrollment(participants) | Healthy School Children |
|---|---|
| Portugal | 14 |
No study locations are listed for this record.
Plan to share: No
No publications or documents are linked to this record.
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University Fernando Pessoa