Heat Acclimation in Females

NCT06551168 | Recruiting

• 1 other identifier: 22G18
• Study Type: interventional
• Target: 14
• Locations: 1 country
• Sites: 1

Brief Summary

Heat acclimation is when you repeatedly exposure yourself to heat so that your body adapts and better tolerates heat. 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.

Conditions

Heat Exposure; Blood Volume; Cardiac Output

Keywords

basic science

Outcome Measures

Primary Outcomes (1)

• Performance

  Participants will complete a timetrial on a cycle ergometer in a heat chamber. Faster times following HA or HAM will be considered a marker of performance

  2 weeks and 5 weeks

Secondary Outcomes (1)

• Intravascular volumes

  2 weeks and 5 weeks

Study Arms (2)

Heat Acclimation

EXPERIMENTAL

Participants in this arm will undergo heat acclimation sessions

Other: Heat exposure

Control

ACTIVE COMPARATOR

Participants in this arm will undergo heart rate matched training volume

Other: Control group

Interventions

Heat exposure OTHER

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.

Heat Acclimation

Control group OTHER

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

Control

Eligibility Criteria

• Age: 18 Years - 55 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Familiar with the sport of cycling and own a bicycle and smart trainer (or a trainer and a power meter).
• 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

You may not qualify if:

• Unable to exercise
• Previous or current heat intolerance
• Pregnant

Sponsors & Collaborators

• Trinity Western University: lead

Study Sites (1)

Trinity Western Unversity

Langley, British Columbia, V2Y 1Y1, Canada

RECRUITING

MeSH Terms

Interventions

Control Groups

Intervention Hierarchy (Ancestors)

Epidemiologic Research Design; Epidemiologic Methods; Investigative Techniques; Research Design; Methods

Study Officials

• Anita T Coté, PhD

  Trinity Western University

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Anita T Coté, PhD

CONTACT

604.513.2121; anita.cote@twu.ca

Normand A Richard, MSc

CONTACT

604.513.2121; nar11@sfu.ca

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Model Details: The experimental group will undergo heat acclimation The control group will not undergo heat acclimation. The control group will undergo heart rate matched exercise of the same quantity but in a cool environment

Study Record Dates

• First Submitted: August 9, 2024
• First Posted: August 13, 2024
• Study Start: September 1, 2024
• Primary Completion: April 24, 2026
• Study Completion: April 24, 2026
• Last Updated: April 10, 2025

Record last verified: 2025-04

Locations

CA (1)