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Caffeine and behavioral stress effects on blood pressure in borderline hypertensive Caucasian men

W R Lovallo1, M al'Absi, G A Pincomb

  • 1Veterans Affairs Medical Center and University of Oklahoma Health Sciences Center, Oklahoma City 73104, USA. bill@oubsci6.vahsc.uokhsc.edu

Health Psychology : Official Journal of the Division of Health Psychology, American Psychological Association
|January 1, 1996
PubMed

Insights

Caffeine consumption during stress significantly elevates blood pressure (BP) in borderline hypertensive men more than in controls. This suggests caffeine may dangerously increase BP in susceptible individuals under pressure.

Area of Science:

  • Cardiovascular Physiology
  • Human Physiology
  • Behavioral Science

Background:

  • Dietary caffeine intake is known to increase blood pressure (BP).
  • Caffeine use often escalates during periods of work-related stress.
  • The combined impact of caffeine and behavioral stress on borderline hypertensive (BH) individuals remains uninvestigated.

Purpose of the Study:

  • To investigate the synergistic effects of caffeine consumption and psychomotor stress on blood pressure in borderline hypertensive men.
  • To compare the cardiovascular response to combined stressors in BH men versus normotensive controls.

Main Methods:

  • A double-blind, crossover study design was employed.
  • Participants included 24 borderline hypertensive men and 24 healthy controls.
  • Caffeine (3.3 mg/kg) was administered alongside a psychomotor stressor task.

Main Results:

  • Borderline hypertensive men exhibited a more pronounced increase in BP in response to the psychomotor stressor compared to controls.
  • The combined effect of caffeine and the stress task resulted in significantly greater BP elevations (+15/+11 mmHg) in BH men than in controls (+10/+6 mmHg).
  • BH men demonstrated sustained BP responses to the stressor despite an exaggerated BP response to caffeine.

Conclusions:

  • Combined caffeine intake and behavioral stress can elevate blood pressure in borderline hypertensive individuals to a clinically significant degree.
  • These findings highlight a potential risk associated with caffeine use during stressful situations for individuals with elevated BP.
  • Further research is warranted to understand the long-term cardiovascular implications for BH individuals consuming caffeine under stress.

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