Study Results
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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RECRUITING
NA
14 participants
INTERVENTIONAL
2024-09-01
2026-04-24
Brief Summary
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This project will determine if completing a heat acclimation maintenance period after heat acclimation is more beneficial than heat acclimating alone for exercise performance in the heat. To determine this, participants will exercise in the heat before heat acclimation, after heat acclimation, and after heat acclimation maintenance. Researchers will assess the heart's pumping capacity, blood volume, body temperature, and exercise performance to determine which approach is more effective.
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Detailed Description
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Justification: Female participation in arduous occupations and professional sport is increasing. Presently a paucity of data regarding the female response to heat acclimation exist. Findings from this study will help females undertake effective and efficient strategies to mitigate thermal strain.
Research design: This is an experimental trial with a treatment and a control group. VO2max, plasma volume (PV), core temperature, and cardiac output will be measured pre-, mid-, and post-intervention. Participants will complete 10 sessions of HA over two weeks. Participants will then undergo three weeks of HAM with three heat sessions per week. A heat performance test will be completed pre-, mid-, and post-intervention to examine performance changes. A control group will complete the same test schedule but will not perform any HA or HAM.
Statistical analysis: Sample size will be 8 females in the experimental and 6 females in the control group. Data will be analyzed for normality using the Shapiro-Wilk test. Descriptive statistics will be presented as the mean and standard deviation. Statistical significance will be determined at P \<0.05. A two-way repeated measure ANOVA will be used to measure differences between groups and hemodynamic, cardiovascular and performance variable differences pre- and post-HA, and pre- post-HAM. If significant effects are present, these will be followed by a post-hoc Tukey's test. Pearson's r correlations (two-tailed) will be conducted between VO2max, and intravascular volumes and heat performance test outcome.
Conditions
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Study Design
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NON_RANDOMIZED
PARALLEL
BASIC_SCIENCE
NONE
Study Groups
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Heat Acclimation
Participants in this arm will undergo heat acclimation sessions
Heat exposure
Participants will exercise at home while wearing a clothing ensemble over 19 one hour sessions. They will use validated perceptual scales to guide their effort and thermal sensation.
Control
Participants in this arm will undergo heart rate matched training volume
Control group
Participants will exercise at home over 19 one hour sessions. They will use heart rate to guide their effort. The exercise will take place in cool conditions
Interventions
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Heat exposure
Participants will exercise at home while wearing a clothing ensemble over 19 one hour sessions. They will use validated perceptual scales to guide their effort and thermal sensation.
Control group
Participants will exercise at home over 19 one hour sessions. They will use heart rate to guide their effort. The exercise will take place in cool conditions
Eligibility Criteria
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Inclusion Criteria
* Endurance athlete or currently engaging in endurance exercise
* Maximal oxygen consumption (VO2max) greater than 40 ml/kg/min
* Between the ages of 18 and 55
* Able to speak, read, and write in English
Exclusion Criteria
* Previous or current heat intolerance
* Pregnant
18 Years
55 Years
FEMALE
Yes
Sponsors
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Trinity Western University
OTHER
Responsible Party
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Anita Cote
Associate Professor
Principal Investigators
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Anita T Coté, PhD
Role: PRINCIPAL_INVESTIGATOR
Trinity Western University
Locations
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Trinity Western Unversity
Langley, British Columbia, Canada
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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22G18
Identifier Type: -
Identifier Source: org_study_id
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