Simulation of Consecutive Day Shift Work

NCT ID: NCT04625634

Last Updated: 2022-07-26

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

23 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-12-02

Study Completion Date

2022-05-01

Brief Summary

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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.

Detailed Description

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Conditions

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Hyperthermia Fatigue; Heat

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Repeated measures study
Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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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.

Group Type EXPERIMENTAL

2 days of work heat stress

Intervention Type OTHER

2 consecutive days of identical simulated structural firefighting tasks.

Interventions

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2 days of work heat stress

2 consecutive days of identical simulated structural firefighting tasks.

Intervention Type OTHER

Eligibility Criteria

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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
Minimum Eligible Age

18 Years

Maximum Eligible Age

39 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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State University of New York at Buffalo

OTHER

Sponsor Role lead

Responsible Party

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Riana Pryor

Primary Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Center for Research and Exercise in Special Environments

Buffalo, New York, United States

Site Status

Countries

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United States

Other Identifiers

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STUDY00003948

Identifier Type: -

Identifier Source: org_study_id

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