Hypertension is associated with greater heat exchange during exercise recovery in a hot environment

• Published in: Brazilian journal of medical and biological research 2015-12, Vol.48 (12), p.1122-1129
• Main Authors: Fonseca, S F, Teles, M C, Ribeiro, V G C, Magalhães, F C, Mendonça, V A, Peixoto, M F D, Leite, L H R, Coimbra, C C, Lacerda, A C R
• Format: Article
• Language: English
• Subjects: Adult; Arterial Pressure - physiology; BIOLOGY; Body mass index; Body Temperature Regulation - physiology; Clinical Investigation; Environment; Exercise; Exercise - physiology; Health aspects; Heart Rate; Hot Environment; Hot Temperature; Humans; Hypertension; Hypertension - physiopathology; Male; MEDICINE, RESEARCH & EXPERIMENTAL; Middle Aged; Oxygen Consumption - physiology; Risk factors; Running - physiology; Sweat - physiology; Thermoregulation
• ISSN: 0100-879X; 1414-431X; 1414-431X
• DOI: 10.1590/1414-431X20154532

Individuals with systemic arterial hypertension have a higher risk of heat-related complications. Thus, the aim of this study was to examine the thermoregulatory responses of hypertensive subjects during recovery from moderate-intensity exercise performed in the heat. A total of eight essential hypertensive (H) and eight normotensive (N) male subjects (age=46.5±1.3 and 45.6±1.4 years, body mass index=25.8±0.8 and 25.6±0.6 kg/m2, mean arterial pressure=98.0±2.8 and 86.0±2.3 mmHg, respectively) rested for 30 min, performed 1 h of treadmill exercise at 50% of maximal oxygen consumption, and rested for 1 h after exercise in an environmental chamber at 38°C and 60% relative humidity. Skin and core temperatures were measured to calculate heat exchange parameters. Mean arterial pressure was higher in the hypertensive than in the normotensive subjects throughout the experiment (P