NCT07198334

The Effect of Daily Brief Heat Exposures on Heat Acclimation

The Effect of Daily Brief Whole-body Heat Exposures on Heat Acclimation and Its Decay

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 26 (actual)
• Sponsor: Lithuanian Sports University · Academic / Other
• Sex: All
• Age: 18 Years – 35 Years
• Healthy volunteers: Accepted

Summary

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.

Conditions

• Healthy Participants

Interventions

Type	Name	Description
OTHER	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.

Timeline

• Start date: 2020-10-01
• Primary completion: 2024-05-31
• Completion: 2024-05-31
• First posted: 2025-09-30
• Last updated: 2025-12-24

Locations

1 site across 1 country: Lithuania