Rewarming study found no clear temperature advantage for moderate over light exercise
Military personnel showed no statistically detectable temperature differences between exercise intensities after outdoor cold-water immersion. Moderate exercise produced a higher heart rate later in recovery.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Following cold-water immersion, core, hand and foot temperatures changed over time, but the study did not detect different temperature responses with low versus moderate exercise intensity. Moderate exercise produced a higher heart rate later in rewarming. The temperature findings do not prove that the approaches are equivalent or establish a general rewarming recommendation.
This abstract-based summary concerns a small, predominantly male military sample. The abstract gives no confidence intervals for temperature differences, limiting judgments about which effects could have been missed.
What researchers found
Core, hand and foot temperature responses
Low versus moderate exercise during 40 minutes of rewarming after 10 minutes of immersion; neither the group effect nor its interaction with time was significant.
Why measure afterdrop?
Afterdrop describes the continued fall in core temperature after leaving cold water. Researchers tracked core and limb temperatures during exercise to test whether intensity altered the rewarming response.
Heart rate and uncertainty
Heart rate was higher with moderate exercise later in recovery. No worsening of afterdrop was detected in this study; this does not prove that the approach is harmless or suitable for other conditions.
The original publication
Effect of Exercise Intensity on Active Rewarming From Outdoor Cold-Water Immersion.
Peterson MN, Duong TC, Weller RS et al.
Mil Med · 2026
- PubMed ID
- 40991898
- Record checked
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