Hemodynamic mechanisms of the attenuated blood pressure response to mental stress after a single bout of maximal dynamic exercise in healthy subjects
| Autor: | Allan Robson Kluser Sales, R.R.T. de Castro, Bruno M. Silva, Antonio C. L. Nóbrega, Tania Gouvêa Thomaz, J.D. Rocha, Fabricia J. Neves, Ana Cristina Gouvea Carvalho, Natalia G. Rocha |
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| Rok vydání: | 2012 |
| Předmět: |
Adult
Male medicine.medical_specialty Cardiac output Exercise test Physiology Haemodynamic response Short Communication Immunology Biophysics Hemodynamics Blood Pressure Biochemistry Young Adult Heart Rate Photoplethysmogram Internal medicine Humans Medicine Cardiac Output General Pharmacology Toxicology and Pharmaceutics Treadmill Stroop test business.industry General Neuroscience Cell Biology General Medicine Stroke volume Middle Aged Cardiovascular system Blood pressure medicine.anatomical_structure Physical therapy Cardiology Vascular resistance Female Sedentary Behavior business Stress Psychological |
| Zdroj: | Brazilian Journal of Medical and Biological Research |
| ISSN: | 0100-879X |
| DOI: | 10.1590/s0100-879x2012007500083 |
| Popis: | To determine the hemodynamic mechanisms responsible for the attenuated blood pressure response to mental stress after exercise, 26 healthy sedentary individuals (age 29 ± 8 years) underwent the Stroop color-word test before and 60 min after a bout of maximal dynamic exercise on a treadmill. A subgroup (N = 11) underwent a time-control experiment without exercise. Blood pressure was continuously and noninvasively recorded by infrared finger photoplethysmography. Stroke volume was derived from pressure signals, and cardiac output and peripheral vascular resistance were calculated. Perceived mental stress scores were comparable between mental stress tests both in the exercise (P = 0.96) and control (P = 0.24) experiments. After exercise, the systolic blood pressure response to mental stress was attenuated (pre: 10 ± 13 vs post: 6 ± 7 mmHg; P < 0.01) along with lower values of systolic blood pressure (pre: 129 ± 3 vs post: 125 ± 3 mmHg; P < 0.05), stroke volume (pre: 89.4 ± 3.5 vs post: 76.8 ± 3.8 mL; P < 0.05), and cardiac output (pre: 7.00 ± 0.30 vs post: 6.51 ± 0.36 L/min; P < 0.05). Except for heart rate, the hemodynamic responses and the mean values during the two mental stress tests in the control experiment were similar (P > 0.05). In conclusion, a single bout of maximal dynamic exercise attenuates the blood pressure response to mental stress in healthy subjects, along with lower stroke volume and cardiac output, denoting an acute modulatory action of exercise on the central hemodynamic response to mental stress. |
| Databáze: | OpenAIRE |
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