Healthy, Heat Stress, Exertional
Conditions
Brief 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.
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.
Interventions
OTHERheat stress
participants will walk in a heat chamber to increase core temperature
Sponsors
Louisiana State University Health Sciences Center Shreveport
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 57 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| expanded timed up and go | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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). |
Countries
United States
Contacts
STUDY_DIRECTORErin McCallister
Louisiana State University Health Sciences Center Shreveport
Outcome results
None listed