Simulation of Consecutive Day Shift Work

July 22, 2022 updated by: Riana Pryor, State University of New York at Buffalo
The purpose of this study is to determine differences in physiological recovery between two consecutive days of simulated fire suppression work. The secondary purpose is to determine differences in heat gain and heat loss between two consecutive days of simulated fire suppression work. Subjects will complete two consecutive days of simulated structural firefighting shift work, 24 hours apart. Before and after each laboratory visit, subjects will continuously wear a Holter monitor and ambulatory blood pressure monitor to quantify parasympathetic tone and recovery from work.

Study Overview

Status

Completed

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

23

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

    • New York
      • Buffalo, New York, United States, 14214
        • Center for Research and Exercise in Special Environments

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

18 years to 39 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 18-39 y old men and women
  • Self-reported to be healthy

Exclusion Criteria:

  • History of any cardiovascular, neurologic, renal, or metabolic disease
  • Current tobacco use or regular use within the last 2 years
  • Taking medications with known thermoregulatory or cardiovascular effects (e.g., aspirin, acetaminophen, ibuprofen, beta blockers, diuretics, psychotropics, etc.)
  • History of exertional heat stroke
  • Currently pregnant or breastfeeding, or planning to become pregnant during the study
  • Inability to follow the rules of the protocols or understand the consent form
  • No contraindications for ingestion of the gastrointestinal temperature pill

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Consecutive work
Subjects will complete 2 consecutive days of simulated firefighting tasks in the heat. The simulated work consists of 20 minutes of simulated structural work in a hot environment, followed by 20 minutes of seated rest in a temperate room, mimicking a typical recovery period in structural firefighting. Subjects then re-enter the environmental chamber and complete 23 minutes of simulated overhaul work in a temperate environment.
2 consecutive days of identical simulated structural firefighting tasks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Core temperature
Time Frame: 20 minutes
Gastrointestinal temperature measured with an ingestable pill.
20 minutes
Heart rate
Time Frame: 20 minutes
Heart rate measured with a wearable heart rate strap and monitor
20 minutes

Collaborators and Investigators

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

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)

December 2, 2019

Primary Completion (Actual)

May 1, 2022

Study Completion (Actual)

May 1, 2022

Study Registration Dates

First Submitted

November 6, 2020

First Submitted That Met QC Criteria

November 6, 2020

First Posted (Actual)

November 12, 2020

Study Record Updates

Last Update Posted (Actual)

July 26, 2022

Last Update Submitted That Met QC Criteria

July 22, 2022

Last Verified

July 1, 2022

More Information

Terms related to this study

Other Study ID Numbers

  • STUDY00003948

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual data can be made available upon written request.

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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