Hemodynamic mechanisms of the attenuated blood pressure response to mental stress after a single bout of maximal dynamic exercise in healthy subjects

Abstract

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.

Low blood pressure is sustained during subsequent activities of daily living performed after power training in older women

“…These data confirm partially our initial hypothesis, once blood pressure values were not lower during the performance of all ADL. Data of the present study corroborate with other experiments, which demonstrate that after a session of physical exercise blood pressure values remain lower during the performance of a subsequent moderate intensity interval physical exercise ( MacDonald et al, 2001 ), routine daily activities ( Mota et al, 2009 ), mental stress ( Hamer et al, 2006 ; Neves et al, 2012 ) and mental stress associated with physical effort ( Ribeiro et al, 2011 ).…”

Blood pressure reactivity to mental stress is attenuated following resistance exercise in older hypertensive women

“…They reported a significant rise in β-2 adrenergic responsiveness after performing an exercise bout, which is demonstrated by a reduction in isoproterenol vasodilator dose necessary to diminish peripheral vascular resistance by 50%, suggesting that an adrenergic-mediated (β-2) vasodilation is one of the mechanisms responsible for BP attenuation during stress after exercise. Nonetheless, this concept is challenged by previous studies reporting that reductions in stroke volume and cardiac output but not peripheral vascular resistance are responsible for a diminished BP response to MS following exercise 11,34. The present results extend the previous studies supporting cardiovascular benefits of RE 4,19.…”

Assessment of a Bout of Moderate and Vigarous Aerobic Exercise on Cardiovascular Responses in Young Adults

“…Yaptığımız çalışmada deney ve kontrol grubu değer-lendirmeleri egzersizler, ortam ısısı ve nemin [20][21][22][23][24][25] 0 C derece ve %40-65 olduğu oda koşullarında gerçekleştirildi. Orman ve kent koşullarında yürümenin kardiyovasküler ve metabolik parametreler üzerine etkilerini inceleyen bir çalışmada ise kişiler sabah ve öğlen 2 saat olmak üzere toplam 6 km yürüyüş yapmış, sabah ve öğlen yürüyüşleri sonrası kan basıncı değerleri ölçülmüştür.…”

“…Bu bağlamda egzersiz programlarında, egzersize kardiyovasküler deği-şikliklerin fizyolojik olarak tolere edilmesi mümkün iken, mental strese bağlı değişimin daha büyük olması ve kompanse edilememesinin göz önünde bulundurulması gerektiği düşünüldü. Benzeri bir çalışmada egzersizin sağlıklı bireylerde mental stresin yol açtığı kan basıncı yanıtını da azalttığı gösterilmiştir (22). Kalp hızının, egzersiz başlangıcındaki artışı parasempatik aktivitedeki düşüşle, ilerleyen dönemlerde ise sempatik aktivitedeki artışla ilişkilidir.…”