HealthyNCT07629414
Impact of Heat on Dual Task Performance
A study testing heat stress in people with Healthy and Heat Stress, Exertional, run by Louisiana State University Health Sciences Center Shreveport at 1 site in United States.
Trial summary
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. Read more about this study
- Who is it for?
- Ages 18 to 57 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy, Heat Stress, Exertional
- What is being tested?
- heat stress
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 10 participants
- Where
- 1 siteUnited States
- Study dates
- 9 Oct 2024to 29 Jul 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 57 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- health via PARQ+
Who cannot join
- inability to safely swallow core temperature pill
- musculoskeletal injury in past 3 months
- diagnosed concussion or vestibular disorder
- known pregnancy
Trial locations and contacts
1 site in 1 country.
About this study
Official title: 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.
Read the 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.
- Conditions
- Healthy, Heat Stress, Exertional
- Being tested
- heat stress
- Medical subject headings
- Heat Stress Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
heat stressOther
participants will walk in a heat chamber to increase core temperature
| Study group | Role | What they receive |
|---|---|---|
| Heat stress | Experimental | Participants will receive the heat stress stimulus Receives: Other: heat stress |
What is being measured
The primary outcome is the main question the study is designed to answer.
expanded timed up and go
A timed test where participants stand from a chair, walk 10 m, turn, and return to the chair. Longer times indicate slower gait speed
Measured: baseline and post-heat stress, both day 1
Firefighter balance test
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.
Measured: baseline and post-heat stress, both day 1
Backward Digit Recall
A timed test where participants recall a series of numbers in reverse order. More digits indicate better recall.
Measured: baseline and post-heat stress, both day 1
Serial Sevens Subtraction
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.
Measured: baseline and post-heat stress, both day 1
Serial Sevens Subtraction-Expanded Timed Up and Go Dual Task
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).
Measured: baseline and post-heat stress, both day 1
Serial Sevens Subtraction-Firefighter Balance Test Dual Task
Performance of serial sevens subtractions while performing the Firefighter Balance Test (FFBT). This test is timed (FFBT) and correct responses tabulated (subtraction).
Measured: baseline and post-heat stress, both day 1
Backward Digit Recall-Expanded Timed Up and Go Dual Task
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).
Measured: baseline and post-heat stress, both day 1
Backward Digit Recall-Firefighter Balance Test Dual Task
Performance of backward digit recall while performing the Firefighter Balance Test (FFBT). This test is timed (FFBT) and correct responses tabulated (Recall).
Measured: baseline and post-heat stress, both day 1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Jun 2026
- Study start9 Oct 2024
- Primary completion29 Jul 2026
- Study completion29 Jul 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for HealthyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 10 participants (actual)
Sponsor and investigators
- Lead sponsor
- Louisiana State University Health Sciences Center Shreveport
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Erin McCallister, Study director, Louisiana State University Health Sciences Center Shreveport
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07629414
- Sponsor's protocol ID
- STUDY00002806
- Status last verified
- May 2026
- First submitted
- 8 May 2026
- Last updated
- 27 Aug 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Cheung SS, McLellan TM, Tenaglia S. The thermophysiology of uncompensable heat stress. Physiological manipulations and individual characteristics. Sports Med. 2000 May;29(5):329-59. doi: 10.2165/00007256-200029050-00004.
PubMed 10840867Moreira PED, Dieguez GTO, Bredt SDGT, Praca GM. The Acute and Chronic Effects of Dual-Task on the Motor and Cognitive Performances in Athletes: A Systematic Review. Int J Environ Res Public Health. 2021 Feb 10;18(4):1732. doi: 10.3390/ijerph18041732.
PubMed 33579018Ness BM, Zimney K, Schweinle WE, Cleland JA. DUAL-TASK ASSESSMENT IMPLICATIONS FOR ANTERIOR CRUCIATE LIGAMENT INJURY: A SYSTEMATIC REVIEW. Int J Sports Phys Ther. 2020 Dec;15(6):840-855. doi: 10.26603/ijspt20200840.
PubMed 33344002Ball D. Contrasting effects of heat stress on neuromuscular performance. Exp Physiol. 2021 Dec;106(12):2328-2334. doi: 10.1113/EP088191. Epub 2020 Jul 15.
PubMed 32608071Doohan MA, Watzek JT, King N, White MJ, Stewart IB. Does increased core temperature alter cognitive performance during exercise-induced heat strain? A narrative review. J Appl Physiol (1985). 2023 Jul 1;135(1):35-52. doi: 10.1152/japplphysiol.00070.2023. Epub 2023 May 4.
PubMed 37141422Donnan K, Williams EL, Morris JL, Stanger N. The effects of exercise at different temperatures on cognitive function: A systematic review. Psychol Sport and Exerc. 2021;54.
Study at a glance
From the registry record, last updated by the sponsor on 27 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Impact of Heat Stress and Fatigue on Dual Task Performance-A Pilot Study.
- ClinicalTrials.gov ID
- NCT07629414
- Acronym / sponsor ID
- STUDY00002806
- Conditions
- Healthy, Heat Stress, Exertional
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 10 participants (actual)
- Lead sponsor
- Louisiana State University Health Sciences Center ShreveportUniversity, hospital or other
- Study start
- 9 Oct 2024 (actual)
- Primary completion
- 29 Jul 2026 (actual)
- Study completion
- 29 Jul 2026 (actual)
- First posted
- 5 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
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 design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Heat stress | Experimental | Other: heat stressParticipants will receive the heat stress stimulus |
Who may qualify
- Ages
- 18 to 57 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- health via PARQ+
Key exclusion criteria (4 listed)
- inability to safely swallow core temperature pill
- musculoskeletal injury in past 3 months
- diagnosed concussion or vestibular disorder
- known pregnancy
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| heat stressparticipants will walk in a heat chamber to increase core temperature | Other | Heat stress |
Primary outcome
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
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.
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.
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.
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).
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).
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).
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).
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Aug 2026.
- Background: PubMed 10840867Cheung SS, McLellan TM, Tenaglia S. The thermophysiology of uncompensable heat stress. Physiological manipulations and individual characteristics. Sports Med. 2000 May;29(5):329-59. doi: 10.2165/00007256-200029050-00004.
- Background: PubMed 33579018Moreira PED, Dieguez GTO, Bredt SDGT, Praca GM. The Acute and Chronic Effects of Dual-Task on the Motor and Cognitive Performances in Athletes: A Systematic Review. Int J Environ Res Public Health. 2021 Feb 10;18(4):1732. doi: 10.3390/ijerph18041732.
- Background: PubMed 33344002Ness BM, Zimney K, Schweinle WE, Cleland JA. DUAL-TASK ASSESSMENT IMPLICATIONS FOR ANTERIOR CRUCIATE LIGAMENT INJURY: A SYSTEMATIC REVIEW. Int J Sports Phys Ther. 2020 Dec;15(6):840-855. doi: 10.26603/ijspt20200840.
- Background: PubMed 32608071Ball D. Contrasting effects of heat stress on neuromuscular performance. Exp Physiol. 2021 Dec;106(12):2328-2334. doi: 10.1113/EP088191. Epub 2020 Jul 15.
- Background: PubMed 37141422Doohan MA, Watzek JT, King N, White MJ, Stewart IB. Does increased core temperature alter cognitive performance during exercise-induced heat strain? A narrative review. J Appl Physiol (1985). 2023 Jul 1;135(1):35-52. doi: 10.1152/japplphysiol.00070.2023. Epub 2023 May 4.
- BackgroundDonnan K, Williams EL, Morris JL, Stanger N. The effects of exercise at different temperatures on cognitive function: A systematic review. Psychol Sport and Exerc. 2021;54.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Erin McCallister study director
Louisiana State University Health Sciences Center Shreveport
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing heat stress in people with Healthy and Heat Stress, Exertional, run by Louisiana State University Health Sciences Center Shreveport at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 27 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
expanded timed up and go (time frame: baseline and post-heat stress, both day 1). The study lists 8 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07629414, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Aug 2026.