Simulation of Consecutive Day Shift Work

State University of New York at Buffalo23 enrolled

Overview

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 Type

INTERVENTIONAL

Allocation

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Hyperthermia Fatigue; Heat

Interventions

2 days of work heat stressOTHER

2 consecutive days of identical simulated structural firefighting tasks.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 39 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

Center for Research and Exercise in Special Environments

Buffalo, New York, United States

Outcomes

Primary Outcomes

Core temperature

Gastrointestinal temperature measured with an ingestable pill.

Time frame: 20 minutes

Heart rate

Heart rate measured with a wearable heart rate strap and monitor

Time frame: 20 minutes

Data from ClinicalTrials.gov

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