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Morava A, Dillon K, Sui W, Alushaj E, Prapavessis H. The effects of acute exercise on stress reactivity assessed via a multidimensional approach: a systematic review. J Behav Med 2024:10.1007/s10865-024-00470-w. [PMID: 38468106 DOI: 10.1007/s10865-024-00470-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 01/18/2024] [Indexed: 03/13/2024]
Abstract
Psychological stress is associated with numerous deleterious health effects. Accumulating evidence suggests acute exercise reduces stress reactivity. As stressors activate a wide array of psychological and physiological systems it is imperative stress responses are examined through a multidimensional lens. Moreover, it seems prudent to consider whether stress responses are influenced by exercise intervention characteristics such as modality, duration, intensity, timing, as well as participant fitness/physical activity levels. The current review therefore examined the role of acute exercise on stress reactivity through a multidimensional approach, as well as whether exercise intervention characteristics and participant fitness/physical activity levels may moderate these effects. Stress reactivity was assessed via heart rate, blood pressure, cortisol, catecholamines, and self-report. A systematic search following PRISMA guidelines of five databases was updated in November 2022. Reviewed studies met the following criteria: English language, participants aged ≥ 18, use of acute exercise, use of a validated stress-inducing task, and assessment(s) of stress reactivity. Thirty-one studies (1386 participants) were included. Acute exercise resulted in reliable reductions to blood pressure and cortisol. Acute exercise yielded mostly negligible effects on heart rate reactivity and negligible effects on self-report measures. As for exercise intervention characteristics, intensity-dependent effects were present, such that higher intensities yielded larger reductions to reactivity measures, while limited evidence was present for duration, modality, and timing-dependent effects. Regarding participant fitness/physical activity levels, the effects on stress reactivity were mixed. Future work should standardize the definitions and assessment time points of stress reactivity, as well as investigate the interaction between physiological and psychological stress responses in real-world contexts.
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Affiliation(s)
- Anisa Morava
- School of Kinesiology, Western University, London, ON, Canada.
| | - Kirsten Dillon
- School of Kinesiology, Western University, London, ON, Canada
| | - Wuyou Sui
- School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, BC, Canada
| | - Erind Alushaj
- Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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2
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Mariano IM, Amaral AL, Ribeiro PAB, Puga GM. A single session of exercise reduces blood pressure reactivity to stress: a systematic review and meta-analysis. Sci Rep 2022; 12:11837. [PMID: 35821393 PMCID: PMC9276760 DOI: 10.1038/s41598-022-15786-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 06/29/2022] [Indexed: 11/09/2022] Open
Abstract
Stressful situations are common in everyday life and disturb homeostasis. So, an exercise session is a strategy to mitigate blood pressure (BP) peaks in response to stress (i.e., BP reactivity), decreasing the cardiovascular risk. This is a systematic review and meta-analysis that aims to verify the effects of a single session of physical exercises on BP reactivity to stress in adults. The searches were performed in digital databases (MEDLINE, LILACS, EMBASE, SPORTDiscus, and PsycInfo) and 29 studies were included, totaling 795 individuals (quantitative analysis: k = 25, n = 659). As for exercise characteristics, 21 of the 29 studies focused on aerobic exercises, and 23 studies focused on low to moderate intensities. As for the stress tests, we have them in the following order from the most to the least frequent: stroop color and word test, cold pressor test, arithmetic test, public speaking, handgrip, trier social stress test, and study task. Favorable metanalytic results (standardized mean differences through random-effects approach) for the exercises were found, with attenuated reactivity in systolic BP (pooled effect size = - 0.38 [- 0.49; - 0.27], representing average reductions of 3.7 ± 3.8 mmHg), diastolic BP (pooled effect size = - 0.51 [- 0.70; - 0.33], representing average reductions of 2.9 ± 3.7 mmHg), and mean BP (pooled effect size = - 0.51 [- 0.72; - 0.31], representing average reductions of 4.1 ± 3.3 mmHg). So, acute physical exercise lowers systolic, diastolic, and mean blood pressure reactivity in response to stressor tasks. However, given the small magnitude of effects, the clinical relevance of this result must be interpreted with caution and be better explored.
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Affiliation(s)
- Igor M Mariano
- Laboratory of Cardiorespiratory and Metabolic Physiology, Physical Education Department, Federal University of Uberlândia, Rua Benjamin Constant, 1286, Neighborhood: Aparecida, Uberlândia, MG, 38400-678, Brazil
| | - Ana Luiza Amaral
- Laboratory of Cardiorespiratory and Metabolic Physiology, Physical Education Department, Federal University of Uberlândia, Rua Benjamin Constant, 1286, Neighborhood: Aparecida, Uberlândia, MG, 38400-678, Brazil
| | - Paula A B Ribeiro
- @CoeurLab Research Unit, Research Center of University of Montreal Hospital Centre, Montreal, QC, H2X 0A9, Canada.,Centre de Médecine Comportemental de Montréal, CIUSSS- NIM, Montreal, QC, H4J 1C5, Canada
| | - Guilherme M Puga
- Laboratory of Cardiorespiratory and Metabolic Physiology, Physical Education Department, Federal University of Uberlândia, Rua Benjamin Constant, 1286, Neighborhood: Aparecida, Uberlândia, MG, 38400-678, Brazil.
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Mariano IM, Amaral AL, V. Carrijo VH, Costa JG, Rodrigues MDL, Cunha TM, Puga GM. Different cardiovascular responses to exercise training in hypertensive women receiving β-blockers or angiotensin receptor blockers: A pilot study. Clin Exp Hypertens 2022; 44:442-450. [DOI: 10.1080/10641963.2022.2065290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Igor M. Mariano
- Physical Education Department, Federal University of Uberlândia, Uberlândia, Brazil
| | - Ana Luiza Amaral
- Physical Education Department, Federal University of Uberlândia, Uberlândia, Brazil
| | | | - Juliene G. Costa
- Physical Education Department, Federal University of Uberlândia, Uberlândia, Brazil
| | | | - Thulio M. Cunha
- Medicine Department, Federal University of Uberlândia, Uberlândia, Brazil
| | - Guilherme M. Puga
- Physical Education Department, Federal University of Uberlândia, Uberlândia, Brazil
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4
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Chen WJ, Mat Ludin AF, Farah NMF. Can Acute Exercise Lower Cardiovascular Stress Reactivity? Findings from a Scoping Review. J Cardiovasc Dev Dis 2022; 9:jcdd9040106. [PMID: 35448082 PMCID: PMC9029480 DOI: 10.3390/jcdd9040106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 12/05/2022] Open
Abstract
Exaggerated cardiovascular reactivity to and delayed recovery from stress increase the risk of cardiovascular diseases in the future. While exercise training has been shown to attenuate stress-induced cardiovascular reactivity and enhance recovery from stress, the effects with acute exercise are less characterized. The aim of this scoping review was to explore the range and characteristics of published evidence regarding acute exercise on cardiovascular reactivity and stress recovery. The secondary objective was to highlight research gaps and implications for future research. A total of 36 articles met the review inclusion/exclusion criteria, involving 1200 participants from various age groups, fitness and health status. Blood pressure (BP) reactivity was the most measured outcome, followed by heart rate (HR) reactivity, and to some extent, heart rate variability. Overall, acute exercise particularly of the moderate-intensity aerobic type effectively reduced stress-induced BP reactivity in the general population. The effects on HR reactivity and cardiovascular recovery were inconclusive. Further research would be recommended to establish if other forms of exercise intensity or type are equally beneficial to lower exaggerated cardiovascular responses to stress. Despite methodological differences and limitations, the available evidence supports the therapeutic potential of acute exercise in addressing the ill effects of stress on cardiovascular health.
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Affiliation(s)
- Wei Joo Chen
- Center for Community Health Studies, Faculty of Health Sciences, Universiti Kebangsan Malaysia, Kuala Lumpur 50300, Malaysia;
| | - Arimi Fitri Mat Ludin
- Center for Healthy Ageing and Wellness, Faculty of Health Sciences, Universiti Kebangsan Malaysia, Kuala Lumpur 50300, Malaysia;
| | - Nor M. F. Farah
- Center for Community Health Studies, Faculty of Health Sciences, Universiti Kebangsan Malaysia, Kuala Lumpur 50300, Malaysia;
- Correspondence:
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Farah NM, Amran AD, Che Muhamed AM. Attenuation of stress-induced cardiovascular reactivity following high-intensity interval exercise in untrained males. J Sports Sci 2021; 39:2755-2762. [PMID: 34323655 DOI: 10.1080/02640414.2021.1957294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Exaggerated cardiovascular (CV) reactivity to stress is associated with negative cardiovascular outcomes. This study aimed to investigate the effects of acute high-intensity interval exercise (HIIE) and moderate-intensity exercise (MIE) on CV reactivity in response to a stress challenge in untrained males. Thirteen, normotensive males (age: 22.8 ± 2 years, BMI: 21.9 ± 3.6 kg/m2) underwent three conditions in counterbalanced order: HIIE (bodyweight exercises; 80-90% HRR), MIE (treadmill-jog; 55-60% HRR) and seated rest (CON) separated by 7-10 days. Thirty minutes after performing HIIE, MIE or CON, subjects underwent a 2-min cold pressor task (CPT). Blood pressure (BP) and heart rate (HR) were measured before, during, and after CPT. CV reactivity, i.e., the change in BP and HR responses were compared across conditions. Systolic BP reactivity were attenuated following HIIE (-60%, p = 0.015) and MIE (-42%, p = 0.033) compared to CON, but no differences were observed between HIIE and MIE. HR reactivity was not different across all conditions. We conclude that performing HIIE or MIE 30 minutes prior to acute stress exposure lowers BP reactivity compared to rest in untrained males. These findings highlight the potential benefits of HIIE in lowering stress-induced elevations in blood pressure.
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Affiliation(s)
- Nor Mf Farah
- Center for Community Health Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Amerull Daneal Amran
- Department of Biomedical Science, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Ahmad Munir Che Muhamed
- Lifestyle Science Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Pulau Pinang, Malaysia
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Antoun M, Ding D, Bohn-Goldbaum EE, Michael S, Edwards KM. Driving in an urban environment, the stress response and effects of exercise. ERGONOMICS 2018; 61:1273-1281. [PMID: 29681228 DOI: 10.1080/00140139.2018.1468494] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
Driving may be detrimental to health, with one hypothesis suggesting that driving may elicit an acute stress response and, with repeated exposures, may become a chronic stressor. The present study examined the stress response to driving and the effectiveness of a prior exercise bout in dampening this response. Twenty healthy adults performed three tasks: control, driving and exercise plus driving. Heart rate (HR), heart rate variability (HRV), blood pressure (BP) and cortisol were measured to quantify the acute stress response to each condition. Data indicated a stress response to driving: HR was elevated and HRV was reduced during the driving task compared with control. HR was elevated and HRV was reduced comparing the exercise plus driving with the driving condition. BP and cortisol were not different among conditions. The potential of interventions, such as exercise, to counter daily stressors should be evaluated to safeguard long-term health. Practitioner Summary: this study confirms that driving induces a stress response, with the exercise intervention providing mixed results (an increase in cardiovascular measures and a decrease in cortisol measure trending significance). Given the known consequences of stress and evidence that exercise can mitigate acute stress, further evaluation of exercise interventions is recommended.
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Affiliation(s)
- Michael Antoun
- a Exercise Health and Performance Research group, Faculty of Health Sciences , University of Sydney , Lidcombe , Australia
| | - Ding Ding
- b Prevention Research Collaboration, School of Public Health, Sydney Medical School, Charles Perkins Centre , University of Sydney , Camperdown , Australia
| | - Erika E Bohn-Goldbaum
- b Prevention Research Collaboration, School of Public Health, Sydney Medical School, Charles Perkins Centre , University of Sydney , Camperdown , Australia
| | - Scott Michael
- a Exercise Health and Performance Research group, Faculty of Health Sciences , University of Sydney , Lidcombe , Australia
| | - Kate M Edwards
- a Exercise Health and Performance Research group, Faculty of Health Sciences , University of Sydney , Lidcombe , Australia
- b Prevention Research Collaboration, School of Public Health, Sydney Medical School, Charles Perkins Centre , University of Sydney , Camperdown , Australia
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Gauche R, Lima RM, Myers J, Gadelha AB, Neri SG, Forjaz CL, Vianna LC. Blood pressure reactivity to mental stress is attenuated following resistance exercise in older hypertensive women. Clin Interv Aging 2017; 12:793-803. [PMID: 28553088 PMCID: PMC5439937 DOI: 10.2147/cia.s130787] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE This study aimed to investigate the effects of resistance exercise (RE) on autonomic control and blood pressure (BP) reactivity during mental stress (MS) in treated older hypertensive women. METHODS Ten older hypertensive women (age =71.1±5.5 years; body mass index =24.2±3.9; mean BP [MBP] =85.4±3.5) underwent a protocol consisting of BP and heart rate variability (HRV) output assessments at baseline and during MS, and these measurements were taken before and 60 minutes after two bouts of RE (traditional and circuit). MS was induced through a computerized 3-minute Stroop color-word test before and 1 hour after each exercise session; BP was measured every minute during MS, and HRV was monitored as a measure of cardiac autonomic control. RESULTS A significant effect of time on systolic BP (Δpre =17.4±12.8 versus Δpost =12.5±9.6; P=0.01), diastolic BP (Δpre =13.7±7.1 versus Δpost =8.8±4.5; P=0.01), and MBP (Δpre =14.0±7.7 versus Δpost =9.3±5.4; P<0.01) after RE was observed, with no differences between the two sessions. In addition, a significant effect of time on log-normalized low-frequency component of HRV (ms2; 5.3±0.8 pre-exercise MS versus 4.8±1.0 baseline value; P=0.023) was also observed, showing a significant change from baseline to MS before RE, but not after RE sessions. These results may be related to a lessened RE-mediated cardiac sympathetic activity during MS. CONCLUSION RE is an effective tool to reduce BP reactivity to MS, which could therefore be associated with an acute reduction in cardiovascular risk. This result presents relevant clinical implications, combining previous evidence that recommends this exercise modality as an important component of an exercise program designed for the older and hypertensive subjects.
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Affiliation(s)
- Rafael Gauche
- Faculty of Physical Education, University of Brasília, Brasília, Brazil
| | - Ricardo M Lima
- Faculty of Physical Education, University of Brasília, Brasília, Brazil.,Cardiology Division, Veterans Affairs Palo Alto Health Care System and Stanford University, Palo Alto, CA, USA
| | - Jonathan Myers
- Cardiology Division, Veterans Affairs Palo Alto Health Care System and Stanford University, Palo Alto, CA, USA
| | - André B Gadelha
- Faculty of Physical Education, University of Brasília, Brasília, Brazil
| | - Silvia Gr Neri
- Faculty of Physical Education, University of Brasília, Brasília, Brazil
| | - Claudia Lm Forjaz
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Lauro C Vianna
- Faculty of Physical Education, University of Brasília, Brasília, Brazil
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Azevêdo LM, de Souza AC, Santos LES, Miguel Dos Santos R, de Fernandes MOM, Almeida JA, Pardono E. Fractionated Concurrent Exercise throughout the Day Does Not Promote Acute Blood Pressure Benefits in Hypertensive Middle-aged Women. Front Cardiovasc Med 2017; 4:6. [PMID: 28261583 PMCID: PMC5308062 DOI: 10.3389/fcvm.2017.00006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 01/25/2017] [Indexed: 01/22/2023] Open
Abstract
Hypertension is a chronic disease that affects about 30% of the world’s population, and the physical exercise plays an important role on its non-pharmacological treatment. Anywise, the dose–response of physical exercise fractionation throughout the day demands more investigation, allowing new exercise prescription possibilities. Therefore, this study aimed to analyze the acute blood pressure (BP) kinetics after 1 h of exercises and the BP reactivity after different concurrent exercise (CE) sessions and its fractioning of hypertensive middle-aged women. In this way, 11 hypertensive women voluntarily underwent three experimental sessions and one control day [control session (CS)]. In the morning session (MS) and night session (NS), the exercise was fully realized in the morning and evening, respectively. For the fractionized session (FS), 50% of the volume was applied in the morning and the remaining 50% during the evening. The MS provided the greatest moments (p ≤ 0.05) of post-exercise hypotension (PEH) for systolic BP (SBP) and highest reduction of BP reactivity for SBP (~44%) and diastolic BP (DBP) (~59%) compared to CS (p ≤ 0.05). The findings of the present study have shown that MS is effective for PEH to SBP, as well as it promotes high quality of attenuation for BP reactivity, greater than the other sessions.
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Affiliation(s)
- Luan M Azevêdo
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
| | - Alice C de Souza
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
| | - Laiza Ellen S Santos
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
| | - Rodrigo Miguel Dos Santos
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
| | - Manuella O M de Fernandes
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
| | - Jeeser A Almeida
- Programa de Pós Graduação em Saúde e Desenvolvimento na Região Centro-Oeste (PPGSD), Universidade Federal de Mato Grosso do Sul , Campo Grande , Brazil
| | - Emerson Pardono
- Programa de Pós Graduação em Educação Física (PPGEF), Universidade Federal de Sergipe , São Cristóvão , Brazil
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Casonatto J, Goessler KF, Cornelissen VA, Cardoso JR, Polito MD. The blood pressure-lowering effect of a single bout of resistance exercise: A systematic review and meta-analysis of randomised controlled trials. Eur J Prev Cardiol 2016; 23:1700-1714. [PMID: 27512052 DOI: 10.1177/2047487316664147] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 07/22/2016] [Indexed: 12/21/2022]
Abstract
BACKGROUND Current exercise guidelines recommend aerobic types of exercises on most days of the week, supplemented with dynamic resistance exercise twice weekly. Whereas the blood pressure (BP)-lowering effects of a single session of aerobic exercise have been well studied, less is known about the hypotensive effect of a single bout of resistance exercise. OBJECTIVES To evaluate the transient effect of resistance exercise on BP by means of meta-analytic techniques. METHODS A systematic electronic search in Medline, Scientific Electronic Library Online (SciELO), Latin American and Caribbean Health Sciences Literature (LILACS), Elton B Stephens Company (EBSCO), EMBASE and SPORTDiscus was completed in March 2015 identifying randomised controlled trials investigating the effect of a single bout of resistance exercise on resting or ambulatory BP in healthy adults. A subsequent meta-analysis was performed. RESULTS The meta-analysis involved 30 studies, 81 interventions and 646 participants (normotensive (n = 505) or hypertensive (n = 141)). A single bout of resistance exercise elicited small-to-moderate reductions in office systolic BP at 60 minutes postexercise [-3.3 (-4.0 to -2.6)/-2.7 (-3.2 to -2.1) mmHg (CI 95%)], 90 minutes postexercise [-5.3 (-8.5 to -2.1)/-4.7 (-6.9 to -2.4) mmHg (CI 95%)] and in 24-hour ambulatory BP [-1.7 (-2.8 to -0.67)/-1.2 (-2.4 to -0.022) mmHg (CI 95%)] compared to a control session. The reduction in office BP was more pronounced in hypertensive compared to normotensive individuals (p < 0.01), when using larger muscle groups (p < 0.05) and when participants were recovering in the supine position (p < 0.01). CONCLUSION A single bout of resistance exercise can have a BP-lowering effect that last for up to 24 hours. Supine recovery and the use of larger muscle groups resulted in greater BP reductions after resistance exercise.
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Affiliation(s)
- Juliano Casonatto
- Research Group of Physiology and Physical Activity, University of North Paraná, Brazil
| | - Karla F Goessler
- Research Group of Cardiovascular Rehabilitation, KU Leuven, Belgium
| | | | - Jefferson R Cardoso
- Laboratory of Biomechanics and Clinical Epidemiology, Londrina State University, Brazil
| | - Marcos D Polito
- Department of Physical Education, Londrina State University, Brazil
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Bruder-Nascimento T, Silva ST, Boer PA, Cordellini S. Effects of exercise training on stress-induced vascular reactivity alterations: role of nitric oxide and prostanoids. Braz J Phys Ther 2015; 19:177-85. [PMID: 26083604 PMCID: PMC4518570 DOI: 10.1590/bjpt-rbf.2014.0088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 11/18/2014] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Physical exercise may modify biologic stress responses. OBJECTIVE To investigate the impact of exercise training on vascular alterations induced by acute stress, focusing on nitric oxide and cyclooxygenase pathways. METHOD Wistar rats were separated into: sedentary, trained (60-min swimming, 5 days/week during 8 weeks, carrying a 5% body-weight load), stressed (2 h-immobilization), and trained/stressed. Response curves for noradrenaline, in the absence and presence of L-NAME or indomethacin, were obtained in intact and denuded aortas (n = 7-10). RESULTS None of the procedures altered the denuded aorta reactivity. Intact aortas from stressed, trained, and trained/stressed rats showed similar reduction in noradrenaline maximal responses (sedentary 3.54 ± 0.15, stressed 2.80 ± 0.10*, trained 2.82 ± 0.11*, trained/stressed 2.97 ± 0.21*, *P < 0.05 relate to sedentary). Endothelium removal and L-NAME abolished this hyporeactivity in all experimental groups, except in trained/stressed rats that showed a partial aorta reactivity recovery in L-NAME presence (L-NAME: sedentary 5.23 ± 0,26#, stressed 5.55 ± 0.38#, trained 5.28 ± 0.30#, trained/stressed 4.42 ± 0.41, #P < 0.05 related to trained/stressed). Indomethacin determined a decrease in sensitivity (EC50) in intact aortas of trained rats without abolishing the aortal hyporeactivity in trained, stressed, and trained/stressed rats. CONCLUSIONS Exercise-induced vascular adaptive response involved an increase in endothelial vasodilator prostaglandins and nitric oxide. Stress-induced vascular adaptive response involved an increase in endothelial nitric oxide. Beside the involvement of the endothelial nitric oxide pathway, the vascular response of trained/stressed rats involved an additional mechanism yet to be elucidated. These findings advance on the understanding of the vascular processes after exercise and stress alone and in combination.
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Affiliation(s)
- Thiago Bruder-Nascimento
- Departamento de Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil
| | - Samuel T Silva
- Departamento de Proteção Vegetal, Faculdade de Ciências Agronômicas, UNESP, Botucatu, SP, Brazil
| | - Patrícia A Boer
- Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Sandra Cordellini
- Departamento de Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil
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