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Responses to V8 Supercar Driving in Hot Conditions

Brearley, Matthew B., Finn, James P. and Royal, K. A. (2002). Responses to V8 Supercar Driving in Hot Conditions. Australian Conference of Science and Medicine in Sport: Sports Medicine and Science at the Extremes, Melbourne, 12-16 October 2002.

Document type: Conference Proceedings
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Title of proceedings Responses to V8 Supercar Driving in Hot Conditions
Conference name Australian Conference of Science and Medicine in Sport: Sports Medicine and Science at the Extremes
Conference location Melbourne
Conference dates 12-16 October 2002
ISBN 1-8753-3410-6   (check CDU catalogue open catalogue search in new window)
Place published Canberra ACT Australia
Publisher Sports Medicine Australia
Publication date 2002
Author(s) Brearley, Matthew B.
Finn, James P.
Royal, K. A.
Start page 38
Subject 1106 - Human Movement and Sports Science
Abstract/Summary Two male V8 Supercar drivers (age: 28.4, 31.3 yrs; peak VO2: 60.0, 47.3; height: 1.77, 1.79 m; body mass: 71.0, 78.7 kg) were studied during the Darwin round of the 2002 V8 Supercar championship to examine thermal, cardiovascular and perceptual responses to competitive driving in hot conditions. Urine specific gravity (USG) and colour was determined prior to each race. Body mass, thermal strain and thermal discomfort were measured pre- and post-race. An ingestible telemetric pill (CorTemp, HTI Technologies, USA) permitted continuous measurement of core body temperature while driving. Race 1 was contested over 52km while races 2 and 3 were 100km. A peak core temperature of 39.7oC was observed following race 2 (cabin temperature 52.1oC, WBGT Index 30.7oC). Although both drivers used cooling interventions, they generally perceived their post-race body temperature as very hot causing them to feel uncomfortable. While body mass loss was limited to 1% during the races, 3% was lost throughout the 30 hours spanning practice to race 3 completion. One driver was well hydrated prior to races (Usg 1.004, 1.007, 1.007), while the hydration status of the other varied (1.023, 1.007, 1.028). The data demonstrates that V8 Supercar drivers can attain core body temperatures approaching hyperthermic values which induce high levels of perceived thermal strain from short driving bouts in hot conditions.
CDU Research RID# 2002000113
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