Effect of Exercise Intensity on Active Rewarming From Outdoor Cold-Water Immersion
Peterson MN, Duong TC, Weller RS, McClintock RJ, Whittier TT, Dunn TL, Jones DM
Military medicine · 1 cita
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Office of Naval Research
- Gobierno
- Naval Health Research Center Institutional Review Board
Según 2 financiadores declarados.
Publicación
- Publicado
- 2025-08-26 · Mil Med · vol. 191 · número 3-4 · págs. e679–e687
- Editorial
- Oxford University Press
- Citado
- 1 cita · más que el 68% de estudios similares · 0.5× el promedio de su campo
- Referencias
- 26 trabajos
- Acceso
- De pago · PUBLIC-DOMAIN
- Áreas de investigación
- Thermoregulation and physiological responses · Thermal Regulation in Medicine · Cardiovascular and exercise physiology
- Palabras clave
- cold water immersion, rewarming, exercise intensity, core body temperature, peripheral temperature, hand temperature, foot temperature, heart rate, military personnel, cold weather operation, hypothermia
- MeSH
- humans, water, body temperature, exercise, rewarming, analysis of variance, immersion, heart rate, adult, military personnel, female, male, cold temperature
7 autores
- Matthew N. Peterson🇺🇸 · autor de correspondenciaNaval Health Research Center
- Tony Duong🇺🇸Leidos (United States); Naval Health Research Center
- Rebecca S. Weller🇺🇸Leidos (United States); Naval Health Research Center
- Rebecca J. McClintock🇺🇸Leidos (United States); Naval Health Research Center
- Tyler T. Whittier🇺🇸Leidos (United States); Naval Health Research Center
- Timothy L. Dunn🇺🇸Naval Health Research Center
- Douglas M. Jones🇺🇸Naval Health Research Center
Resumen
El texto original del estudio, en el idioma en que se publicó.
Introduction
Cold-water immersion (CWI) is a threat to warfighters operating in the cold. Even after removal from the cold, core temperature continues to decrease because of the afterdrop effect. The purpose of this study is to evaluate the effect of exercise-intensity on rewarming from CWI.
Materials and methods
Following a randomized match-paired design, 28 military personnel (27 Male, 1 Female; mean ± SD age: 29 ± 7year; ht: 175 ± 11 cm; wt: 86.9 ± 12.5 kg; body fat: 22 ± 9%) were immersed in an outdoor pond (air: -4.2 °C; water: 1.3 °C) for 10 minutes and subsequently rewarmed for 40 minutes by following a low-intensity [LI (n = 14); 30% VO2R] or moderate-intensity [MI (n = 14); 45% VO2R] exercise protocol. Core temperature, hand temperature, foot temperature, and heart rate were recorded throughout. Physiological responses were analyzed in 5-minute increments using a 2 (condition) by 11 (time) repeated measures analysis of variance (ANOVA) with significance set to P < .05.
Results
After 20 minutes of exercise, heart rate was significantly higher in the MI group relative to the LI group (P < .05). Core temperature (F = 34.0, P < .001, ηp2 = 0.630), hand temperature (F = 114.9, P < .001, ηp2 = 0.839), and foot temperature (F = 128.8, P < .001, ηp2 = 0.896) were all significantly different across time points; however, there was no main effect of group or group by time interaction effects.
Conclusions
Results suggest that rewarming of the core, hands, and feet following CWI were similar between LI and MI groups. Moderate-intensity exercise did not exacerbate the afterdrop effect. When rewarming after CWI, the Warfighter can select a low-to-moderate exercise intensity that best fits their comfort and mission requirements.
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