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Related Experiment Video

Updated: May 5, 2026

Short Session High Intensity Interval Training and Treadmill Assessment in Aged Mice

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Published on: February 2, 2019

Exercise-heat acclimation in young and older trained cyclists.

Stuart Best¹, Martin Thompson¹, Corinne Caillaud¹

¹Exercise Health and Performance Research Group, Faculty of Health Sciences, University of Sydney, Australia.

Journal of Science and Medicine in Sport

|November 21, 2013

Summary

Age does not impact the body's ability to acclimatize to exercise-heat stress in highly trained adults. Both young and older individuals show similar improvements in body temperature and sweat loss after heat acclimation.

Keywords:

Acclimatisation Ageing Thermoregulation

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

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Published on: March 9, 2021

Area of Science:

Exercise Physiology
Environmental Physiology
Aging Research

Background:

Heat acclimation improves physiological responses to exercise in hot environments.
Understanding age-related differences in heat acclimation is crucial for optimizing training and safety.

Purpose of the Study:

To investigate the influence of age on the capacity to acclimatize to exercise-heat stress.
To test the hypothesis that age does not affect body temperature and heat loss responses during short-term exercise-heat acclimation in trained individuals.

Main Methods:

Seven young (19-32 years) and seven older (50-63 years) highly trained subjects were studied.
Subjects underwent exercise testing (60 min at 70%VO2max) in hot-dry and thermoneutral conditions before and after 6 days of exercise-heat acclimation.
Measurements included rectal temperature, skin temperature, heart rate, cutaneous vascular conductance, and whole body sweat loss.

Main Results:

Body temperature, skin temperature, heart rate, cutaneous vascular conductance, and sweat loss were similar between age groups pre- and post-acclimation.
Both young and older groups showed similar relative decreases in rectal temperature and increases in sweat loss after heat acclimation.
Younger subjects exhibited significant reductions in heart rate and increases in cutaneous vascular conductance post-acclimation, which were not observed in older subjects.

Conclusions:

Age does not alter the capacity for acclimatization of body temperature or sweat loss to exercise-heat stress in highly trained adults.
Cardiovascular adaptations to short-term exercise-heat acclimation differ between young and older trained individuals.
These findings suggest that while cardiovascular responses vary, the fundamental physiological adjustments for heat tolerance are preserved with age in trained populations.