Evaluation of a Workplace Intervention for Musculoskeletal Disorders Among Blue-collar Workers

March 7, 2026 updated by: National Research Centre for the Working Environment, Denmark

GLAD - Feasibility of a Preventative Workplace Intervention for Musculoskeletal Disorders and Pain Among Blue-collar Workers

The goal of this feasibility study is to learn if a work environment program to address musculoskeletal disorders and pain, can be implemented and accepted by employees with physical demanding work tasks. The main question it aims to answer is:

  • Will the intervention be accepted by the workers?
  • It it feasible to implement a workplace intervention to prevent musculoskeletal disorders and pain?

Participants will:

  • Implement the intervention
  • Participate in the intervention twice a week for eight weeks
  • Answer questionnaires and participate in interviews to evaluate the intervention

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

70

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

  • Denmark
      • Copenhagen, Denmark
        • The National Research Centre for the Working Environment

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. An in-house occupational safety and health professional (OSH) employed at the workplace, or an out-house OSH employed at one of two OSH consultancies.
  2. All the workers employed at the unit at the participating workplace.

Exclusion Criteria:

  • None

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: GLAD intervention
Behavioral: GLAD intervention

The intervention consists of two components:

  1. Implementation of the GLAD intervention to the workers at one unit at the participating workplaces. The GLAD intervention consists of 15 modules containing knowledge on pain, participatory ergonomics and physical exercises. Each module last 30 minutes and are delivered by an occupational safety and health professional (OSH).
  2. Education of the OSH's to deliver the GLAD intervention. The education aim to give the OSH the necessary knowledge, skills and competencies to deliver the intervention to the workers at their workplaces. The education program consists of evidence-based knowledge on pain and management, content of the GLAD intervention and implementation strategies. The education is delivered as an online preparatory work (approximately 1 hour) and a 7-hour course with physical attendance.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Acceptability
Time Frame: From enrollment to the end of the 10 week-intervention period
The theoretical framework of acceptability questionnaire will be used to evaluate acceptability as well as interviews guided by the acceptability framework.
From enrollment to the end of the 10 week-intervention period

Collaborators and Investigators

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

Sponsor

National Research Centre for the Working Environment, Denmark

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)

April 10, 2025

Primary Completion (Actual)

June 27, 2025

Study Completion (Actual)

June 27, 2025

Study Registration Dates

First Submitted

March 3, 2026

First Submitted That Met QC Criteria

March 7, 2026

First Posted (Actual)

March 12, 2026

Study Record Updates

Last Update Posted (Actual)

March 12, 2026

Last Update Submitted That Met QC Criteria

March 7, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 34530

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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