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The influence of ice slurry ingestion on maximal voluntary contraction following exercise-induced hyperthermia

Citation

Siegel, R and Mate, J and Watson, G and Nosaka, K and Laursen, PB, The influence of ice slurry ingestion on maximal voluntary contraction following exercise-induced hyperthermia, European Journal of Applied Physiology, 111, (10) pp. 2517-2524. ISSN 1439-6319 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 Springer-Verlag

DOI: doi:10.1007/s00421-011-1876-5

Abstract

The purpose of this study was to determine whether ingestion of a small bolus of ice slurry (1.25 g kg-1) could attenuate the reduction in maximal voluntary isometric contraction (MVC) torque output during a 2-min sustained task following exercise-induced hyperthermia. On two separate occasions, 10 males (age: 24 ± 3 years, VO2peak: 49.8 ± 4.7 ml kg-1 min-1) ran to exhaustion at their first ventilatory threshold in a hot environment (34.1 0.1C, 49.5 3.6% RH). Prior to and after exercise, subjects performed a 2-min sustained MVC of the right elbow flexors in a thermoneutral environment (24.6 0.8C, 37.2 4.5% RH). The post exercise MVC was performed immediately following the ingestion of either 1.25 g kg-1 of ice slurry (-1C; ICE) or warm fluid (40C; CON), in a counterbalanced and randomised order. Run time to exhaustion (42.4 9.5 vs. 41.7 8.7 min; p = 0.530), and rectal (39.08 0.30 vs. 39.08 0.30C; p = 0.934) and skin temperatures (35.26 0.65 vs. 35.28 0.67C; p = 0.922) and heart rate (189 5 vs. 189 6 beats min-1; p = 0.830) at the end of the run were similar between trials. Torque output during the post-exercise 2-min sustained MVC was significantly higher (p = 0.001) following ICE (30.75 16.40 Nm) compared with CON (28.69 14.88 Nm). These results suggest that ice slurry ingestion attenuated the effects of exercise-induced hyperthermia on MVC, possibly via internal thermoreceptive and/or temperature-related sensory mechanisms.

Item Details

Item Type:Refereed Article
Keywords:thermoreception, thermoregulation, internal cooling, isometric strength, elbow flexors, rectal temperature
Research Division:Medical and Health Sciences
Research Group:Human Movement and Sports Science
Research Field:Exercise Physiology
Objective Division:Health
Objective Group:Health and Support Services
Objective Field:Health and Support Services not elsewhere classified
Author:Watson, G (Dr Greig Watson)
ID Code:78790
Year Published:2011
Web of Science® Times Cited:16
Deposited By:Health Sciences A
Deposited On:2012-07-26
Last Modified:2012-11-13
Downloads:1 View Download Statistics

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