Hemodynamic after-effects of acute dynamic exercise in sedentary normotensive postmenopausal women

Harvey, Paula; Morris, Beverley L.; Kubo, Toshihiko; Picton, Peter; Su, Winnie; Notarius, Catherine F.; Floras, John S.

doi:10.1097/00004872-200502000-00010

Cited by 85 publications

(116 citation statements)

References 37 publications

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“…The reduction in peripheral vascular resistance after a single session of aerobic exercise has been previously reported in various populations (3,13,16,21), including postmenopausal women (29). Many mechanisms have been proposed to explain this vasodilator response.…”

Section: Discussionmentioning

confidence: 78%

“…To our knowledge, postexercise hypotension in postmenopausal women has been investigated in only one prior study (29), in which reductions of 5/6 mmHg in SBP and DBP were observed. These reductions are similar to those observed in the present study (9/4 mmHg), as well as to those reported in recent reviews on this issue (11,22,43,53), which concluded that postexercise hypotension can be expected to produce reductions of 5-10 mmHg in SBP and DBP in normotensive individuals.…”

Section: Discussionmentioning

confidence: 98%

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Low-dose estrogen therapy does not change postexercise hypotension, sympathetic nerve activity reduction, and vasodilation in healthy postmenopausal women

Oneda

Forjaz²,

Bernardo³

et al. 2008

American Journal of Physiology-Heart and Circulatory Physiology

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The aim of this study was to determine whether estrogen therapy enhances postexercise muscle sympathetic nerve activity (MSNA) decrease and vasodilation, resulting in a greater postexercise hypotension. Eighteen postmenopausal women received oral estrogen therapy (ET; n ϭ 9, 1 mg/day) or placebo (n ϭ 9) for 6 mo. They then participated in one 45-min exercise session (cycle ergometer at 50% of oxygen uptake peak) and one 45-min control session (seated rest) in random order. Blood pressure (BP, oscillometry), heart rate (HR), MSNA (microneurography), forearm blood flow (FBF, plethysmography), and forearm vascular resistance (FVR) were measured 60 min later. FVR was calculated. Data were analyzed using a two-way ANOVA. Although postexercise physiological responses were unaltered, HR was significantly lower in the ET group than in the placebo group (59 Ϯ 2 vs. 71 Ϯ 2 beats/min, P Ͻ 0.01). In both groups, exercise produced significant decreases in systolic BP (145 Ϯ 3 vs. 154 Ϯ 3 mmHg, P ϭ 0.01), diastolic BP (71 Ϯ 3 vs. 75 Ϯ 2 mmHg, P ϭ 0.04), mean BP (89 Ϯ 2 vs. 93 Ϯ 2 mmHg, P ϭ 0.02), MSNA (29 Ϯ 2 vs. 35 Ϯ 1 bursts/min, P Ͻ 0.01), and FVR (33 Ϯ 4 vs. 55 Ϯ 10 units, P ϭ 0.01), whereas it increased FBF (2.7 Ϯ 0.4 vs. 1.6 Ϯ 0.2 ml ⅐ min Ϫ1 ⅐ 100 ml Ϫ1 , P ϭ 0.02) and did not change HR (64 Ϯ 2 vs. 65 Ϯ 2 beats/min, P ϭ 0.3). Although ET did not change postexercise BP, HR, MSNA, FBF, or FVR responses, it reduced absolute HR values at baseline and after exercise. postmenopause; aerobic exercise; muscle sympathetic nerve activity; blood pressure THE POSTMENOPAUSAL PERIOD is accompanied by a number of physiological alterations (49). In postmenopausal women, blood pressure gradually increases (71), resulting in a considerably higher incidence of hypertension than that seen in premenopausal women (68). This difference has been attributed to abnormalities in arteriolar resistance caused by the absence of estrogen (48) and/or by physiological aging (1). Arteriolar resistance and hypertension are usually associated with an increase in sympathetic activity or responsiveness (33,64). However, the effects of menopause on sympathetic activity remain unclear. One recent study evaluated Polish and American women between 40 and 56 yr of age (50). The authors found that sympathetic activity in the postmenopausal women was similar to that observed in the premenopausal women. In contrast, the authors of a study conducted in Japan (46) observed higher sympathetic nerve activity in post-and premenopausal middle-aged women. Discrepancies in results might be related to many factors, such as ethnic background and diet.Postmenopausal women are often treated with hormone replacement therapy to minimize the symptoms and consequences of menopause. However, the effects of this therapy depend on the type and dose of hormone employed (31). Currently, many women are receiving natural estrogens, and the North American Menopause Society recommends that hormone replacement therapy should be administered in low doses to avoid any possible side effects (...

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Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 98%

Low-dose estrogen therapy does not change postexercise hypotension, sympathetic nerve activity reduction, and vasodilation in healthy postmenopausal women

Oneda

Forjaz²,

Bernardo³

et al. 2008

American Journal of Physiology-Heart and Circulatory Physiology

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“…In a study conducted in NT and hypertensive elderly persons, 6 reduced BP was observed only in hypertensive subjects after executing a single exercise session (ES) on a cycloergometer. In another study including only NT women, 7 a marked reduction in BP was observed after acute dynamic exercise in middle-aged and elderly women but not in young women. Other studies 8,9 have shown greater BP reductions in persons aged 41-60 years compared with older and younger individuals.…”

Section: Introductionmentioning

confidence: 86%

Effect of a single session of aerobic walking exercise on arterial pressure in community-living elderly individuals

et al. 2012

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Several studies have demonstrated that one exercise session (ES) on a cycloergometer or ergometric treadmill causes a reduction in blood pressure (BP). However, there are few similar studies on walking, which is the exercise modality most available to the elderly. We investigated the immediate and 24-h effects of walking on BP in independent, community-living elderly individuals. Volunteers participated in a single ES and resting control session (CS). Before and after each session, BP was measured by auscultatory and oscillometric methods. After each session, 24-h ambulatory blood pressure monitoring was conducted. An accelerometer was installed 48 h before the sessions and left in place for 5 days. The mean volunteer age was 67.7 ± 3.5 years; 11 were hypertensive patients under treatment, and 12 were normotensive. In the total sample, there were immediate 14mm Hg and 12 mm Hg reductions in systolic BP (SBP) after the ES according to the auscultatory and oscillometric methods, respectively. Diastolic BP (DBP) was reduced by 4 mm Hg after the ES according to both methods. SBP during wakefulness and sleep and DBP during wakefulness were lower after the ES than after the CS (Po0.01), when wakefulness and sleep were determined individually (variable-time pattern) using data from the activity monitors and provided by the volunteers. Keywords: actigraph; aerobic exercise; ambulatory blood pressure monitoring; blood pressure; elderly individuals INTRODUCTIONThe aging process is associated with many important physiological changes, of which increased blood pressure (BP) is one of the most well known. In addition to regular physical exercise, a single session of acute exercise has also been observed to reduce BP during the recovery period.Hypotensive responses have been observed in hypertensive animals 1,2 and normotensive (NT) and hypertensive humans. [3][4][5][6] The magnitude of the hypotensive response to aerobic exercise varies between NT and hypertensive subjects and young and elderly subjects. In a study conducted in NT and hypertensive elderly persons, 6 reduced BP was observed only in hypertensive subjects after executing a single exercise session (ES) on a cycloergometer. In another study including only NT women, 7 a marked reduction in BP was observed after acute dynamic exercise in middle-aged and elderly women but not in young women. Other studies 8,9 have shown greater BP reductions in persons aged 41-60 years compared with older and younger individuals.Ambulatory arterial blood pressure monitoring (ABPM) has been extensively used to obtain more detailed information about BP

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“…Inversamente, na presente investigação os sujeitos foram submetidos à sessão de exercício em esteira ergométrica. Atualmente não existe suporte teórico indicando que as respostas hipotensivas agudas podem estar relacionadas ao tipo de ergômetro utilizado, uma vez que outros estudos de acompanhamento subagudo têm identificado a ocorrência de hipotensão pós-exercício em protocolos executados em esteira ergométrica com amostra de normotensos sedentários 27,28 .…”

Section: Préunclassified

Impacto Do Exercício Contínuo E Intervalado Na Resposta Autonômica E Pressórica Em 24 Horas

Casonatto

Domingues

Christofaro

2016

Rev Bras Med Esporte

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Artigo originAl Original article artículO Original RESUMOIntrodução: Exercícios físicos aeróbicos contínuos são os mais relacionados com a hipotensão pós-exercício. No entanto, são escassas as informações sobre o impacto do exercício intervalado sobre a resposta pressórica de 24 horas. Objetivo: Comparar as respostas pressóricas subagudas e agudas em uma sessão de exercício aeróbico contínuo e intervalado e identificar possíveis modulações em indicadores de atividade autonômica em adultos normotensos. Métodos: Submeteram-se 25 adultos normotensos saudáveis a três sessões experimentais: controle (30 minutos em repouso), exercício contínuo (30 min. -60%-70% da FC res ) e exercício intervalado (6 sessões de 5 minutos com intervalos de 2 min. -60-70% da FC res ) e seus parâmetros cardiovasculares foram monitorados por 24 horas após as sessões. Para comparação dos dados, foi utilizada a ANOVA para medidas repetidas, seguida de suas hipóteses. Resultados: No acompanhamento subagudo foi identificada redução significativa (P < 0,05) da pressão arterial sistólica somente após a sessão de exercício contínuo em comparação com a sessão de repouso (115 ± 2 mmHg vs. 112 ± 2 mmHg) e à sessão controle (119 ± 2 mmHg vs. 112 ± 2 mmHg). Não se identificou redução da pressão arterial ambulatorial em nenhuma das sessões experimentais. Os indicadores autonômicos parassimpáticos (RMSSD e pNN50) permaneceram reduzidos após 30 minutos em ambas as sessões de exercício. Conclusão: Uma única sessão de exercício aeróbico contínuo causa redução subaguda da pressão arterial em adultos normotensos. A sessão única de exercício aeróbico contínuo e intervalado não promove redução da pressão arterial ambulatorial na média nos períodos intermediários de sono e vigília.Descritores: hipotensão pós-exercício; monitorização ambulatorial; pressão arterial. ABSTRACT

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Hemodynamic after-effects of acute dynamic exercise in sedentary normotensive postmenopausal women

Cited by 85 publications

References 37 publications

Low-dose estrogen therapy does not change postexercise hypotension, sympathetic nerve activity reduction, and vasodilation in healthy postmenopausal women

Low-dose estrogen therapy does not change postexercise hypotension, sympathetic nerve activity reduction, and vasodilation in healthy postmenopausal women

Effect of a single session of aerobic walking exercise on arterial pressure in community-living elderly individuals

Impacto Do Exercício Contínuo E Intervalado Na Resposta Autonômica E Pressórica Em 24 Horas

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