Changes in Shoulder Muscle Activation According to the Methods of Carrying Backpacks

August 18, 2021 updated by: Kyunghoon Min, CHA University

Changes in Muscle Activation of Serratus Anterior, Deltoid (Anterior) and Trapezius (Upper and Lower) According to the Methods of Carrying Backpacks

To investigate change of shoulder muscles by measuring muscle activity according to the position of the backpack.

Study Overview

Status

Enrolling by invitation

Conditions

Intervention / Treatment

Detailed Description

Most of modern people, including students and office workers, wear backpacks for a considerable amount of time. There have been prior studies on the change in muscle activity around the spine and shoulders muscles according to the weight of the backpack, but studies on the change in muscle activity according to the direction of the bag are insufficient. So this study is to evaluate the effect on the musculoskeletal system by comparing the activity of the muscles around the shoulder according to the anterior or posterior wearing of the backpack.

Muscles around the shoulder are composed of: Serratus anterior, trapezius(upper and lower) which control scapular movement and deltoid muscles which activate shoulder abduction directly. We would like to focus change of these muscles's activities when carrying a backpack according to the anterior or posterior direction and bilateral or unilateral.

To measure muscle activity, eight-channel electromyography (EMG) Using Nicolet EDX (Natus Medical Inc., San Carolos, CA, USA), surface EMG (sEMG) signal were used.

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Korea, Republic of
    • Gyeonggi-do
      • Seongnam-si, Gyeonggi-do, Korea, Republic of, 13496
        • Bundang CHA Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 59 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Healthy adults from 20s to 50s

Exclusion Criteria:

  • Restriction of joint motion range of shoulder and elbow
  • Hisory of upper limb surgery in the past 6 months
  • If there is an external wire such as a temporary external pacemaker or central line guide wire

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Experimental group
Group measuring shoulder muscle activities by surface EMG with carrying backpacks forward
Diagnostic test: surface EMG
surface EMG estimation with Carrying backpacks forward or backward

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Root mean square of each muscle activation
Time Frame: through study completion, an average of 1 year
Quantification of muscle activation
through study completion, an average of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

CHA University

Investigators

  • Study Director: Kyunghoon Min, MD, PhD, Department of Rehabilitation Medicine, CHA Bundang Medical Center, CHA University School of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 9, 2021

Primary Completion (Anticipated)

December 31, 2021

Study Completion (Anticipated)

December 31, 2021

Study Registration Dates

First Submitted

May 6, 2021

First Submitted That Met QC Criteria

May 6, 2021

First Posted (Actual)

May 10, 2021

Study Record Updates

Last Update Posted (Actual)

August 20, 2021

Last Update Submitted That Met QC Criteria

August 18, 2021

Last Verified

August 1, 2021

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • BundangCHA

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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