Thermoregulatory, cardiovascular, and psychophysical response to alcohol in men in 40°C water

T. G. Allison, W. E. Reger

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The goals of the study were to test the hypotheses that ethyl alcohol (ETOH) in low-to-moderate doses would alter thermoregulation and/or disrupt the normal relationship between physiological and psychophysical indexes of heat stress during 40°C water immersion and to characterize the cardiovascular response to the combined stimuli of heat, water immersion, and ETOH. Six healthy men underwent three trials of 21 min of immersion in water at 40.0 ± 0.1°C after consuming 0, 0.27, or 0.54 g ETOH/kg. Esophageal temperature (T(es)) rose by ~1.0°C during immersion for each trial. Per unit of T(es) rise, changes during immersion in skin temperature, sweat rate, heart rate, systolic and diastolic blood pressure, and psychophysical assessments of comfort and overheating did not differ significantly by trial. Across trials, there was an apparent threshold for activation of thermoregulatory responses at an ~0.5°C increase in T(es) occurring after ~9 min of immersion. This threshold was identified psychophysically by increased ratings of overheating and decreased comfort. Above the threshold, there was an attenuation of the rate of increase of T(es). Cardiovascular stress was mild (rate-pressure product ~12,000) and not significantly increased by ETOH. Hypotension and tachycardia when subjects stood to exit the tub were observed. The data suggest that ETOH at the doses administered does not affect thermoregulatory, cardiovascular, or psychophysical indexes of heat stress during 40°C water immersion.

Original languageEnglish (US)
Pages (from-to)2099-2107
Number of pages9
JournalJournal of Applied Physiology
Volume72
Issue number6
StatePublished - 1992

Fingerprint

Immersion
Alcohols
Water
Ethanol
Hot Temperature
Blood Pressure
Skin Temperature
Sweat
Body Temperature Regulation
Tachycardia
Hypotension
Heart Rate
Pressure
Temperature

Keywords

  • hot tub
  • hyperthermia
  • hypotension
  • sweat rate

ASJC Scopus subject areas

  • Endocrinology
  • Physiology
  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

Cite this

Thermoregulatory, cardiovascular, and psychophysical response to alcohol in men in 40°C water. / Allison, T. G.; Reger, W. E.

In: Journal of Applied Physiology, Vol. 72, No. 6, 1992, p. 2099-2107.

Research output: Contribution to journalArticle

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