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Monitoring and Evaluation of Posture in Office Workstations With Artificial Intelligence

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT04122326
Recruitment Status : Completed
First Posted : October 10, 2019
Last Update Posted : November 3, 2020
U.S. National Science Foundation
Information provided by (Responsible Party):
Shawn Roll, University of Southern California

Brief Summary:
Office workers spend 11.6 hours per day in sedentary activities during the day, leading to increased health risks. Although there is literature on prevalence of musculoskeletal disorders and work station modification for office workers, successful implementation and follow-through of evidence-based recommendations in office environments is extremely challenging. This study aims to validate various techniques for evaluating posture, particularly in the neck, shoulder, and trunk, in order to develop evidence-based feedback for the office desk user. This study will include up to 40 volunteers over the age of 18 who regularly work on computer-based tasks at a desk. Participants will be observed working in a provided work station in a variety of different working postures. Data are collected using electromyography sensors, Kinect camera, and at least two video recording cameras to obtain postural information. Measurement of joint positioning and posture will be completed using an ergonomic screening tool from images collected throughout the testing. Participants will provide information on their level of comfort throughout various body regions in response to working in various positions. This will be an iterative study with multiple positions used to test the positioning of sensors, and the development of suitable algorithms to evaluate posture. The collected data will be used to inform sensing methods for office work posture.

Condition or disease Intervention/treatment Phase
Musculoskeletal Pain Musculoskeletal Injury Musculoskeletal Strain Behavioral: Workstation Modification Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 20 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description: Participants will be asked to work at an office workstation in a sequence of different workstation setups.
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Posture Sensing Method Validation at the Office Workstation
Actual Study Start Date : May 1, 2019
Actual Primary Completion Date : October 25, 2019
Actual Study Completion Date : January 15, 2020

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Posture Sequence
Participants will complete computer work on a provided monitor and keyboard for two hours. During the first hour, the research personnel will alter the workstation every ten minutes to test various different postures of the neck, shoulder, arms, and trunk. The sequence will include 3 seated postures and 3 standing postures. At the end of the first hour, the participant will be instructed to adjust the workstation independently and continue to work for 60 minutes for an observational session.
Behavioral: Workstation Modification
Participants are asked to work in a sequence of workstation setups for ten minutes each. The sequence include 1. sitting with workstation adjusted by the participant, 2. sitting with workstation adjusted to promote proper posture, 3. sitting with workstation adjusted to promote unnatural posture, 4. standing with workstation adjusted by the participant, 5. standing with workstation adjusted to promote proper posture, and 6. standing with workstation adjusted to promote unnatural posture. After the sequence of setups, the participant allowed to adjust the workstation in either sitting/standing to work in 60 minutes in their own desired position.

Primary Outcome Measures :
  1. Change in Pain on the Visual Analog Pain Scale from baseline [ Time Frame: Baseline, every 10 minutes the first hour, every 15 minutes the second hour ]
    A Visual Analog Pain Scale is a ten-centimeter long line in which participants are asked to place a mark from a minimum of 0 (no pain) to a maximum of 10 (worst pain imaginable). Participants respond to pain, discomfort, or other sensations (i.e. numbness) in their R/L Hand/Wrist, R/L Forearm/Elbow, R/L Shoulder, Neck, Upper Back, Lower Back, R/L Hip/Leg, R/L Foot.

Secondary Outcome Measures :
  1. Posture on the Rapid Upper Limb Assessment [ Time Frame: Every ten minutes the first hour, average across the second hour ]
    The Rapid Upper Limb Assessment is a screening tool to assess risk of upper limb injury by looking at posture, force, and repetitive/static task. This is assessed using still frame images following the completion of the task.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • 18 years old or older
  • Ability to read, speak, and converse in English

Exclusion Criteria:

  • Severe limitations in range of motion through the upper extremity, trunk or neck
  • Significant musculoskeletal disorders (e.g., low back pain, carpal tunnel syndrome, cervical radiculopathy)
  • Neurological conditions that affect sensation

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04122326

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United States, California
University of Southern California
Los Angeles, California, United States, 90089
Sponsors and Collaborators
University of Southern California
U.S. National Science Foundation
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Principal Investigator: Shawn C Roll, PhD University of Southern California
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Responsible Party: Shawn Roll, Associate Professor, University of Southern California Identifier: NCT04122326    
Other Study ID Numbers: UP-19-00140
First Posted: October 10, 2019    Key Record Dates
Last Update Posted: November 3, 2020
Last Verified: November 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Musculoskeletal Pain
Muscular Diseases
Musculoskeletal Diseases
Neurologic Manifestations