Practical precooling: Effect on cycling time trial performance in warm conditions

Marc J. Quod, David T. Martin, Paul B. Laursen, Andrew S. Gardner, Shona L. Halson, Frank E. Marino, Margaret P. Tate, David E. Mainwaring, Christopher J. Gore, Allan G. Hahn

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


The purpose of this study was to compare the effects of two practical precooling techniques (skin cooling vs. skin + core cooling) on cycling time trial performance in warm conditions. Six trained cyclists completed one maximal graded exercise test ([V̇]O2peak 71.4 ± 3.2 ml · kg-1 · min-1) and four ∼40 min laboratory cycling time trials in a heat chamber (34.3°C ± 1.1°C; 41.2% ± 3.0% rh) using a fixed-power/variable-power format. Cyclists prepared for the time trial using three techniques administered in a randomised order prior to the warm-up: (1) no cooling (control), (2) cooling jacket for 40 min (jacket) or (3) 30-min water immersion followed by a cooling jacket application for 40 min (combined). Rectal temperature prior to the time trial was 37.8°C ± 0.1°C in control, similar in jacket (37.8°C ± 0.3°C) and lower in combined (37.1°C ± 0.2°C, P < 0.01). Compared with the control trial, time trial performance was not different for jacket precooling (-16 ± 36 s, -0.7%; P = 0.35) but was faster for combined precooling (-42 ± 25 s, -1.8%; P = 0.009). In conclusion, a practical combined precooling strategy that involves immersion in cool water followed by the use of a cooling jacket can produce decrease in rectal temperature that persist throughout a warm-up and improve laboratory cycling time trial performance in warm conditions.

Original languageEnglish
Pages (from-to)1477-1487
Number of pages11
JournalJournal of Sports Sciences
Issue number14
Publication statusPublished - 2008
Externally publishedYes


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