Impact of Heat on Dual Task Performance

June 4, 2026 updated by: Louisiana State University Health Sciences Center Shreveport

Impact of Heat Stress and Fatigue on Dual Task Performance-A Pilot Study.

This study looks at how people response performing single and dual tasks (cognitive and motor) prior to and after a rapid heat stress that increased core temperature to 39C.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Participants will perform single and dual tasks at baseline (normal temperature). These tasks are cognitive (recall and serial subtraction) and motor (gait and balance). Then participants will put on firefighter gear and walk on the treadmill in a hot, humid environment until their core temperature reaches 39C. Then, they will repeat the single and dual tasks with the elevated core temperature.

Study Type

Interventional

Enrollment (Estimated)

10

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 Contact

Study Locations

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

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • health via PARQ+

Exclusion Criteria:

  • inability to safely swallow core temperature pill
  • musculoskeletal injury in past 3 months
  • diagnosed concussion or vestibular disorder
  • known pregnancy

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: Heat stress
Participants will receive the heat stress stimulus
Other: heat stress
participants will walk in a heat chamber to increase core temperature

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
expanded timed up and go
Time Frame: baseline and post-heat stress, both day 1
A timed test where participants stand from a chair, walk 10 m, turn, and return to the chair. Longer times indicate slower gait speed
baseline and post-heat stress, both day 1
Firefighter balance test
Time Frame: baseline and post-heat stress, both day 1
A timed test where participants walk an obstacle course measuring dynamic balance, having to step up/down, walk a narrow path, and duck under an obstacle. Longer times indicate worse dynamic balance.
baseline and post-heat stress, both day 1
Backward Digit Recall
Time Frame: baseline and post-heat stress, both day 1
A timed test where participants recall a series of numbers in reverse order. More digits indicate better recall.
baseline and post-heat stress, both day 1
Serial Sevens Subtraction
Time Frame: baseline and post-heat stress, both day 1
A timed test where participants count backwards from a starting value by 7s, with the more correct responses in 20 seconds indicating better cognitive ability for this task.
baseline and post-heat stress, both day 1
Serial Sevens Subtraction-Expanded Timed Up and Go Dual Task
Time Frame: baseline and post-heat stress, both day 1
Performance of serial sevens subtractions while performing the Expanded timed up and go test (ETUG). This test is timed (ETUG) and correct responses tabulated (subtraction).
baseline and post-heat stress, both day 1
Serial Sevens Subtraction-Firefighter Balance Test Dual Task
Time Frame: baseline and post-heat stress, both day 1
Performance of serial sevens subtractions while performing the Firefighter Balance Test (FFBT). This test is timed (FFBT) and correct responses tabulated (subtraction).
baseline and post-heat stress, both day 1
Backward Digit Recall-Expanded Timed Up and Go Dual Task
Time Frame: baseline and post-heat stress, both day 1
Performance of backward digit recall while performing the Expanded timed up and go test (ETUG). This test is timed (ETUG) and correct responses tabulated (Recall).
baseline and post-heat stress, both day 1
Backward Digit Recall-Firefighter Balance Test Dual Task
Time Frame: baseline and post-heat stress, both day 1
Performance of backward digit recall while performing the Firefighter Balance Test (FFBT). This test is timed (FFBT) and correct responses tabulated (Recall).
baseline and post-heat stress, both day 1

Collaborators and Investigators

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

Sponsor

Louisiana State University Health Sciences Center Shreveport

Investigators

  • Study Director: Erin McCallister, Louisiana State University Health Sciences Center Shreveport

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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)

October 9, 2024

Primary Completion (Estimated)

August 1, 2026

Study Completion (Estimated)

August 1, 2026

Study Registration Dates

First Submitted

May 8, 2026

First Submitted That Met QC Criteria

June 4, 2026

First Posted (Actual)

June 5, 2026

Study Record Updates

Last Update Posted (Actual)

June 5, 2026

Last Update Submitted That Met QC Criteria

June 4, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • STUDY00002806

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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