Crushed Ice Ingestion Does Not Improve Female Cycling Time Trial Performance in the Heat

Matthew Zimmermann, Grant Justin Landers, Karen Wallman

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Web of Science)

    Abstract

    This study examined the effects of precooling via ice ingestion on female cycling performance in hot, humid conditions. Ten female endurance athletes, mean age (28 +/- 6 y), height (167.6 +/- 6.5 cm) and body-mass (68.0 +/- 11.5 kg) participated-in the study. Participants completed an 800 kJ cycle time-trial in hot, humid conditions (34.9 +/- 0.3 degrees C, 49.8 +/- 3.5% RH). This was preceded by the consumption of 7 g.kg(-1) of crushed ice (ICE) or water (CON). There was no difference in performance time (CON 3851 +/- 449 s; ICE 3767 +/- 465 s), oxygen consumption (CON 41.6 +/- 7.0 ml.kg.min(-1); ICE 42.4 +/- 6.0 ml.kg.min(-1)) or respiratory exchange ratio (CON 0.88 +/- 0.05; ICE 0.90 +/- 0.06) between conditions (p >.05, d <0.5). Core and skin temperature following the precooling period were lower in ICE (T-c 36.4 +/- 0.4 degrees C; T-sk 31.6 +/- 1.2 degrees C) compared with CON (T-c 37.1 +/- 0.4 degrees C; T-sk 32.4 +/- 0.7 degrees C) and remained lower until the 100 kJ mark of the cycle time-trial (p 1.0). Sweat onset occurred earlier in CON (228 +/- 113 s) compared with ICE (411 +/- 156 s) (p

    Original languageEnglish
    Pages (from-to)67-75
    Number of pages9
    JournalInternational Journal of Sport Nutrition and Exercise Metabolism
    Volume27
    Issue number1
    DOIs
    Publication statusPublished - Feb 2017

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