Backpack Load and Spine Muscles Activity

Not Applicable

Completed

• Conditions: Child
• Interventions: Other: loading conditions

• Registration Number: NCT02725645
• Lead Sponsor: University Fernando Pessoa

Brief Summary

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.

Detailed Description

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.

Study Timeline

• Study Start: 2014-06
• Primary Completion: 2015-07
• Study Completion: 2015-08
• Study First Submitted: 2016-03-21
• Study First Submitted QC: 2016-03-28
• Study First Posted: 2016-04-01
• Results First Submitted: 2019-01-12
• Status Verified: 2019-10
• Results First Submitted QC: 2019-10-24
• Last Update Submitted: 2019-10-24
• Results First Posted: 2019-10-28
• Last Update Posted: 2019-10-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 14

Inclusion Criteria

• children with tutor consent

Exclusion Criteria

• children with cognitive impairment

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Healthy school children	loading conditions	elementary school children will be presented with different backpack loading conditions

Primary Outcome Measures

Name	Time	Method
Muscle Activity as a Measure of Route Mean Square	one year	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.