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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Healthy school children | Experimental | elementary school children will be presented with different backpack loading conditions |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| loading conditions | Other | Different backpack loading conditions 0%, 10%, 15% and 20% allocated randomly |
|
| Measure | Description | Time Frame |
|---|---|---|
| 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. | one year |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Sandra Rodrigues, MSc, Mphil | University Fernando Pessoa | Principal Investigator |
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elementary school children, male and female, with no history of spine problems. Tutors provided legal authorization.
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| ID | Title | Description |
|---|---|---|
| FG000 | Healthy School Children | Participants had to stand, using backpacks with different load conditions, while being monitored with emg. |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
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| ID | Title | Description |
|---|---|---|
| BG000 | Healthy School Children | Participants had to stand with different backpack loading conditions. |
| Units | Counts |
|---|---|
| Participants |
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| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Categorical | Count of Participants |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | 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. | Posted | Mean | Standard Deviation | milivolts | one year |
|
|
1 year
Participants were screened for any discomfort related to the use of surface emg electrodes and monitored for any possible dizziness.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Healthy School Children | Participants had to stand with different backpack loading conditions |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Sandra Beatriz Pereira Rodrigues | Universidade Fernando Pessoa | sandrar@ufp.edu.pt |
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| Participants |
|
| Age, Continuous | Mean | Standard Deviation | years |
|
| Sex: Female, Male | Count of Participants | Participants |
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| Region of Enrollment | Number | participants |
|
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| 0 |
| 14 |
| 0 |
| 14 |
| 0 |
| 14 |
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