Muscle Activity During Load Carriage in ROTC Cadets

NCT ID: NCT04744246

Last Updated: 2021-02-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-09-07

Study Completion Date

2020-11-01

Brief Summary

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Army ROTC Cadets who are currently enrolled in Military Science courses will be asked to participate in this experimental research design. A total of 30 healthy cadets consisting of approximately 24 males and six females will be recruited, as this will provide an accurate representation of the overall Army demographics with 17% being female.

Paperwork: After providing consent, participants age and gender will be documented, and height and weight will be measured and documented. Participants will complete a modified version of the Modified Oswestry Low Back Pain Disability Questionnaire, which has been adjusted to be more specific to the military population. The questionnaire will be filled out indicating the cadet's current level of pain. They will then complete the same questionnaire indicating their pain within the last year.

Protocol: First, the skin will be prepared and surface electromyography (EMG) electrodes will be placed. Dynamic, surface EMG data will be obtained of the gluteus medius, gluteus maximus, erector spinae, rectus femoris, and biceps femoris muscles in accordance with SENIAM (Surface Electromyography for the Non-Invasive Assessment of Muscles) guidelines. Skin preparatation will consist of trimming hair if the skin surface at which the electrodes have to be placed is covered with hair. Next, the skin will be cleaned with alcohol. The skin will be allowed to dry prior to electrode placement. Lastly, skin will be abraded to reduce impedance. Following electrode application, participants will complete five minutes of light activity on a bike or treadmill for warm-up. Next, in order to normalize the data, manual muscle tests will be performed for each of the six muscles being test. Then, participants will walk at a speed of four miles per hour for 10 seconds as a dynamic measurement for normalizing the data.

After completion of the two normalization protocols, participants will complete a five kilometer (3.1 mile) walk on a treadmill at a speed of three miles per hour, with and without a 35 lb. load carried in a traditional rucksack. The load conditions will be randomized and counterbalanced in order to mitigate effects of fatigue, and the conditions will be performed in two separate sessions (separated by 24-48 hours).

Detailed Description

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Conditions

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Back Pain

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

SCREENING

Blinding Strategy

NONE

Study Groups

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Without Load

5 kilometer walk with no load carried

Group Type ACTIVE_COMPARATOR

load carriage

Intervention Type OTHER

35 pound load carried on the back

With Load

5 kilometer walk with load

Group Type EXPERIMENTAL

load carriage

Intervention Type OTHER

35 pound load carried on the back

Interventions

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load carriage

35 pound load carried on the back

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* current enrollment in military science courses and member of Army ROTC

Exclusion Criteria

* current musculoskeletal injuries
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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North Dakota State University

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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North Dakota State University

Fargo, North Dakota, United States

Site Status

Countries

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United States

Other Identifiers

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HE20208

Identifier Type: -

Identifier Source: org_study_id

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