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The Effect of Daily Brief Heat Exposures on Heat Acclimation

NCT ID: NCT07198334

Last Updated: 2025-12-24

Study Results

Results pending

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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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

26 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-10-01

Study Completion Date

2024-05-31

Brief Summary

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This study is the first to examine the effects of short passive heat exposure on heat acclimation (HA). Unlike traditional protocols requiring prolonged heat exposure, this study tests whether a daily 5-minute whole-body immersions at 45°C water repeated over two weeks can trigger adaptive responses, offering a potentially more accessible and time-efficient method for heat acclimation. This study aims to investigate whether brief, repeated passive heat exposure can induce HA in both female and male participants. It evaluates changes across physiological, biological, and psychological markers to determine the efficacy of this minimal-exposure protocol. It is hypothesized that such short, repeated immersions may be sufficient to elicit significant adaptive responses across key HA indicators.

Detailed Description

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Conditions

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Healthy Participants

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Heat acclimation

Group Type EXPERIMENTAL

Heat acclimation

Intervention Type OTHER

Passive heat acclimation was designed to induce adaptation in participants through 14 consecutive days of controlled 5-minute whole-body immersion in water at 45°C.

Interventions

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Heat acclimation

Passive heat acclimation was designed to induce adaptation in participants through 14 consecutive days of controlled 5-minute whole-body immersion in water at 45°C.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Healthy, non-obese males and females aged 18 to 35 years with a body mass index between 18.5 and 29.9 kg/m².
* No participation in temperature manipulation programs (e.g., cold or heat acclimation) within the past three months.
* No engagement in excessive formal exercise.
* Female participants must have a regular menstrual cycle.

Exclusion Criteria

* Current smokers.
* Fear of needles or blood.
* Use of medications or supplements that could affect study outcomes.
* History of neurological, cardiovascular, metabolic, or inflammatory diseases that could be aggravated by hot water exposure.
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Lithuanian Sports University

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Lithuanian Sports University

Kaunas, , Lithuania

Site Status

Countries

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Lithuania

Other Identifiers

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LithuanianSportsU-26

Identifier Type: -

Identifier Source: org_study_id