title: Effects of tobacco smoking on the blood temperature during exercise.
abstract: By thermometry in mixed venous blood the thermal reactions to exercise programmes of different durations were studied in healthy volunteers before and after smoking. Pulmonary oxygen uptake (V02), arterio-venous oxygen difference (AVD) and heart rate (HR) were also measured. It was found that exercise-induced rise in blood temperature was considerably augmented after smoking. This effect was parallelled (and probably partly caused) by an increased heat production reflected by increased V02. During short-term exercise an accelerated rise in AVD might indicate that a centripetal redistribution of the total blood flow could have contributed to the thermal response by a reduced skin blood flow. During long-term exercise cardiac output and heart rate increased and the stroke volume decreased in response to smoking.
mesh_terms: D000328:Adult; D001831:Body Temperature; D002302:Cardiac Output; D006339:Heart Rate; D006801:Humans; D008168:Lung / Q000378:metabolism; D010101:Oxygen Consumption; D005082:Physical Exertion; D012907:Smoking / Q000502:physiology*; D013318:Stroke Volume