Caffeine Increases Sweating Sensitivity via Changes in Sudomotor Activity During Physical Loading

  • Kim T
  • Shin Y
  • Lee J
 et al. 
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We assessed the effect of caffeine on sudomotor activity and sweating sensitivity during physical loading. Both physiological responses could occur due to energy expenditure. Subjects were 13 athletically trained males (22.1 +/- 3.7 years old, 174.2 +/- 5.4 cm tall, and weighing 70.9 +/- 4.6 kg, with maximal oxygen consumption [VO(2)max] of 53.6 +/- 4.4 mL/kg/minute). The study involved a within-subject, random, crossover design. Tests were performed following the ingestion of 3 mg/kg caffeine. The physical loading involved running for 30 minutes at 60% VO(2)max (24.0 +/- 0.5 degrees C, 40 +/- 3.0% relative humidity). Tympanic temperature (TYMP) was significantly higher in the caffeine-consuming group (Caffe-I) at pre-exercise (40 minutes after caffeine intake and immediately before running) (P

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  • Tae-Wook Kim

  • Young-Oh Shin

  • Jeong-Beom Lee

  • Young-Ki Min

  • Hun-Mo Yang

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