The interaction of race and climatic adaptation on patterns of cardiovascular reactivity among young adult males was examined. Malay and Chinese subjects living in a tropical climate in the Orient and Caucasians living in a sub-tropical climate in North America were investigated. The cold presser test with hand immersion in cold water was used as the stressor. Systolic and diastolic blood pressures, cardiac frequency, cardiac output, and stroke volume were measured. The results provided limited evidence for absence of differences in cardiac reactivity among racial groups and for greater vascular reactivity in the Caucasians. Cold immersion also elicited differential responses which could be partially attributed to differences in acclimatization status. (C) 1995 Wiley-Liss, Inc.
DUNCAN, MT; HUSAIN, R; CHEN, HM; HORVATH, SM
POPULATION DIFFERENCES IN CARDIOVASCULAR REACTIVITY TO THE COLD PRESSOR TEST
American Journal Of Human Biology