Changes in Muscle Activation When Carrying Backpacks

Surface Emg Clinical Trial

Official title:

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

Clinical Trial Details — Status: Withdrawn

Administrative data

• NCT number: NCT04869241
• Other study ID #: BundangCHA
• Status: Withdrawn
• Phase: N/A
• Start date: May 3, 2021
• Est. completion date: May 28, 2021

Study information

• Verified date: May 2021
• Source: Bundang CHA Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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

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.

Recruitment information / eligibility

• Status: Withdrawn
• Enrollment: 0
• Est. completion date: May 28, 2021
• Est. primary completion date: May 28, 2021
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 20 Years to 59 Years

Eligibility

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

Related Conditions & MeSH terms

• Surface Emg

Intervention

Diagnostic Test:
• surface EMG
Carrying backpacks forward or backward

Locations

Country	Name	City	State
Korea, Republic of	Bundang CHA Medical Center	Seongnam-si	Gyeonggi-do

Sponsors (1)

Lead Sponsor	Collaborator
Bundang CHA Hospital

Country where clinical trial is conducted

Korea, Republic of, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Root mean square of each muscle activation	Quantification of muscle activity	through study completion, an average of 1 year