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Responses of motor-sport athletes to V8 supercar racing in hot conditions

Brearley, Matthew B. and Finn, James P. (2007). Responses of motor-sport athletes to V8 supercar racing in hot conditions. International Journal of Sports Physiology and Performance,2(2):182-191.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 9 times in Scopus Article | Citations
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Title Responses of motor-sport athletes to V8 supercar racing in hot conditions
Author Brearley, Matthew B.
Finn, James P.
Journal Name International Journal of Sports Physiology and Performance
Publication Date 2007
Volume Number 2
Issue Number 2
ISSN 1555-0265   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-63349106960
Start Page 182
End Page 191
Total Pages 10
Place of Publication Champaign, IL, United States of America
Publisher Human Kinetics
Field of Research 1106 - Human Movement and Sports Science
HERDC Category C1 - Journal Article (DEST)
Abstract Background:
Despite the thermal challenge of demanding workloads performed in high cabin temperatures while wearing heavy heat-retardant clothing, information on physiological responses to racing V8 Supercars in hot conditions is not readily available.

Purpose:
To describe the thermal, cardiovascular, and perceptual strain on V8 Supercar drivers competing in hot conditions.

Methods:
Thermal strain was indicated by body-core temperature using an ingested thermosensitive pill. Cardiovascular strain was assessed from heart rate, hydration status, and sweat rate. Perceptual strain was estimated from self-rated thermal sensation, thermal discomfort (modified Gagge scales), perceived exertion (Borg scale), and perceptual strain index.

Results:
Prerace body-core temperatures were (mean ± SD) 37.7°C ± 0.4°C (range 37.0°C to 38.2°C), rising to 39.0°C ± 0.4°C (range 38.4°C to 39.7°C) postrace. Driver heart rates were >160 and >170 beats/min for 85.3% and 46.7% of racing, respectively. Sweat rates were 1.06 ± 0.12 L/h or 13.4 ± 1.2 mL · kg–1 · h–1, and postrace dehydration was 0.6% ± 0.6% of prerace body mass. Drivers rated thermal sensation as hot (10.3 ± 0.9), thermal discomfort as uncomfortable (3.1 ± 1.0), and perceived exertion as very hard to very, very hard (8.7 ± 1.7) after the races. Overall physiological and perceptual strain were 7.4 ± 1.0 and 7.1 ± 1.2, respectively.

Conclusions: Despite the use of cooling, V8 Supercar drivers endure thermal, cardiovascular, and perceptual strain during brief driving bouts in hot conditions.
 
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Created: Fri, 12 Sep 2008, 08:35:25 CST by Administrator