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Acute acetaminophen (paracetamol) ingestion improves time to exhaustion during exercise in the heat

Mauger, Alexis R., Taylor, Lee, Harding, Christopher, Wright, Benjamin, Foster, Josh, Castle, Paul C. (2014) Acute acetaminophen (paracetamol) ingestion improves time to exhaustion during exercise in the heat. Experimental Physiology, 99 . pp. 164-171. ISSN 0958-0670. (doi:10.1113/expphysiol.2013.075275) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:36244)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1113/expphysiol.2013.075275

Abstract

Acetaminophen (paracetamol) is a commonly used over-the-counter analgesic and antipyretic and has previously been shown to improve exercise performance through a reduction in perceived pain. This study sought to establish whether its antipyretic action may also improve exercise capacity in the heat by moderating the increase in core temperature. On separate days, 11 recreationally active participants completed a graded exercise test, a familiarisation time to exhaustion and two experimental time to exhaustion trials on a cycle ergometer in hot conditions (30 °C, 50% rh) after ingesting a placebo control or an oral dose of acetaminophen in a randomised, double-blind design. Following acetaminophen ingestion, participants cycled for a significantly longer period of time (acetaminophen = 23 ± 15 min vs. placebo = 19 ± 13 min, p = 0.005) (95% CI = 90-379 s), and this was accompanied by significantly lower core (-0.15 °C), skin (-0.47 °C) and body temperatures (0.19 °C) (p < 0.05). In the acetaminophen condition, participants also reported significantly lower ratings of thermal sensation (-0.39, p = 0.015), but no significant change in heart rate was observed (p > 0.05). This is the first study to demonstrate that an acute dose of acetaminophen can improve cycling capacity in hot conditions, and that this may be due to the observed reduction in core, skin and body temperature, and the subjective perception of thermal comfort. These findings suggest that ACT may reduce the thermoregulatory strain elicited from exercise, thus improving time to exhaustion.

Item Type: Article
DOI/Identification number: 10.1113/expphysiol.2013.075275
Subjects: Q Science > QP Physiology (Living systems)
Divisions: Faculties > Sciences > School of Sport and Exercise Sciences
Depositing User: Lex Mauger
Date Deposited: 12 Nov 2013 16:15 UTC
Last Modified: 23 Jan 2020 04:07 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/36244 (The current URI for this page, for reference purposes)
Mauger, Alexis R.: https://orcid.org/0000-0001-6685-5800
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