Post-exercise cold water immersion: effect on core temperature and melatonin responses

Elisa Robey; Brian Dawson; Shona Halson; Carmel Goodman; Warren Gregson; Peter Eastwood

doi:10.1007/s00421-012-2436-3

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Post-exercise cold water immersion: effect on core temperature and melatonin responses

Journal article

Peer reviewed

Post-exercise cold water immersion: effect on core temperature and melatonin responses

Elisa Robey, Brian Dawson, Shona Halson, Carmel Goodman, Warren Gregson and Peter Eastwood

European journal of applied physiology, Vol.113(2), pp.305-311

2013

DOI: https://doi.org/10.1007/s00421-012-2436-3

PMID: 22706550

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Abstract

Rectal temperature

Salivary melatonin

Circadian rhythms

High intensity exercise

To study the effect of post-exercise cold water immersion (CWI) on core temperature and melatonin responses, 10 male cyclists completed two evening (~1800 hours) cycling trials followed by a 15-min CWI (14 °C) or warm water immersion (WWI; 34 °C), and were then monitored for 90 min post-immersion. The exercise trial involved 15 min at 75 % peak power, followed by a 15 min time trial. Core (rectal) temperature was not different between the two conditions pre-exercise (~37.4 °C), post-exercise (~39 °C) or immediately post-immersion (~37.7 °C), but was significantly (p < 0.05) below pre-exercise levels at 60 and 90 min post-immersion in both conditions. Core temperature was significantly lower after CWI than WWI at 30 min (36.84 ± 0.24 vs. 37.42 ± 0.40 °C, p < 0.05) and 90 min (36.64 ± 0.24 vs. 36.95 ± 0.43 °C, p < 0.05) post-immersion. Salivary melatonin levels significantly increased (p < 0.05) from post-exercise (~5 pM) to 90 min post-immersion (~8.3 pM), but were not different between conditions. At 30 and 90 min post-immersion heart rate was significantly lower (~5–10 bpm, p < 0.01) after CWI than WWI. These results show that undertaking either CWI or WWI post-exercise in the evening lowers core temperature below baseline for at least 90 min; however, the magnitude of decrease is significantly greater following CWI. The usual evening increase in melatonin is unaffected by exercise or post-exercise water immersion undertaken between ~1800 and ~2000 hours.

Details

Title: Post-exercise cold water immersion: effect on core temperature and melatonin responses
Authors/Creators: Elisa Robey - The University of Western Australia
Brian Dawson - The University of Western Australia
Shona Halson - ACT
Carmel Goodman - College Station Medical Center
Warren Gregson - Liverpool John Moores University
Peter Eastwood - The University of Western Australia
Publication Details: European journal of applied physiology, Vol.113(2), pp.305-311
Publisher: Springer Nature
Number of pages: 7
Identifiers: 991005592765107891
Murdoch Affiliation: Vice Chancellery
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 1 Clinical & Life Sciences; 1.137 Sleep Science & Circadian Systems; 1.137.217 Circadian-Melatonin
Web Of Science research areas: Physiology; Sport Sciences
ESI research areas: Clinical Medicine