Skip to main content
padlock icon - secure page this page is secure

The effects of caffeine during exercise in fire protective ensemble

Buy Article:

$61.00 + tax (Refund Policy)

To examine the effects of caffeine during exercise in fire protective ensemble (FPE), 10 healthy males completed 3 × 10 min bouts of treadmill exercise on two separate days. Sixty minutes prior to exercise either 6 mg/kg of caffeine (CAFF) or dextrose placebo (PLA) capsules were ingested (randomly assigned, double blind). End-exercise gastrointestinal temperature (Tgi) was higher in CAFF compared to PLA (38.80 ± 0.08°C vs. 38.43 ± 0.11°C, p ≤ 0.01). Ventilation (V˙E) and tidal volume (Vt) were also significantly higher in CAFF, which resulted in higher consumption of air from the self-contained breathing apparatus. While perceived exertion in the caffeine condition was decreased (p ≤ 0.05) compared to placebo, the higher Tgi values increased calculated physiological strain index in CAFF (p ≤ 0.01). Caffeine appears to alter the physiological and psycho-physical responses to exercise in FPE and may influence factors related to work tolerance in firefighting. These findings are relevant to occupations such as firefighting where workers are encapsulated during exposure to heavy physical work and/or environmental heat. The results indicate that workers may be more susceptible to heat-related fatigue, illness or injury with ingestion of significant amounts of caffeine. To the authors' knowledge this is the first study involving humans and exercise to detect an increase in body temperature with caffeine ingestion.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: caffeine; firefighters; heat stress; self-contained breathing apparatus

Document Type: Research Article

Affiliations: 1: School of Kinesiology and Health Studies, Queens University, Kingston, Ontario, Canada 2: School of Exercise Science, Physical & Health Education, University of Victoria, Victoria, British Columbia, Canada 3: Faculty of Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada

Publication date: November 1, 2009

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more