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Related Experiment Video

Updated: Nov 8, 2025

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

A 5-day Heat Acclimation Program Improves Heat Stress Indicators While Maintaining Exercise Capacity.

Floris C Wardenaar¹, Carmen P Ortega-Santos¹, Kaila A S Vento¹

¹Athleat Field Lab, College of Health Solutions, Arizona State University, Phoenix, Arizona.

Journal of Strength and Conditioning Research

|April 26, 2021

Summary

This summary is machine-generated.

A 5-day heat acclimation program significantly improved physiological heat stress indicators, including lower core temperature and heart rate, while maintaining exercise capacity in partially acclimated individuals.

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Area of Science:

Exercise Physiology
Environmental Physiology
Sports Science

Background:

Heat acclimation is crucial for athletes performing in hot environments.
Short-term heat acclimation protocols are being investigated for efficacy.
Understanding physiological adaptations to heat stress is vital for performance optimization.

Purpose of the Study:

To evaluate the effectiveness of a 5-day isothermic biking protocol on physiological heat acclimation.
To determine if this protocol improves exercise performance capacity in partially acclimated subjects.
To assess changes in core temperature, skin temperature, and heart rate during exercise in heat.

Main Methods:

A quasi-experimental design with an intervention (INT) and control (CON) group.
Participants completed Cooper Tests (pre and post) and a heat stress test.
Physiological measures included core temperature, skin temperature, and heart rate monitoring.

Main Results:

The intervention group exhibited a significantly smaller increase in core temperature during the heat stress test.
The intervention group also showed a lower peak heart rate and skin temperature compared to the control group.
While not statistically significant, the intervention group demonstrated a positive trend in exercise performance.

Conclusions:

A short-term, 5-day heat acclimation program can induce positive physiological adaptations to heat stress.
The protocol effectively reduces core temperature and heart rate responses during exercise in the heat.
This approach shows potential for improving heat tolerance without compromising exercise capacity.