Energy and fluid balance during a 214-km winter ultraendurance race: a case study

Journal of Applied Physiology 2026 Open access

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Authors: Kyle W. Wehmanen, Brent C. Ruby, Timothy C. Shriver, Michele Novaes Ravelli, Shalaya Kipp, John McDaniel, Erich J. Petushek, Steven J. Elmer
DOI: 10.1152/japplphysiol.01162.2025
Cited by: 1
References: 29

Abstract

In this short report, we detail new data on the upper limits of human energy expenditure (9.6 times basal metabolic rate) and water turnover (10.5 L·12 h −1 ) during continuous single-day exercise in the cold. Our results indicated elevated energy use, and impressively, water turnover comparable to exercise in warmer conditions. These findings have implications for training and endurance performance of strenuous exercise in cold weather environments.

Fields of Study & Subjects

Thermoregulation and physiological responses Muscle metabolism and nutrition Cardiovascular and exercise physiology

Publication details

Journal / source
Journal of Applied Physiology
Publisher
American Physiological Society
Volume
140
Issue
4
Pages
927–934
Publication date
7 February 2026
Language
EN