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Previous issue date: 2016-08-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Introdu??o: estudos demonstram a ocorr?ncia de hipotens?o p?s-exerc?cio (HPE) ap?s ~60 minutos de exerc?cio intervalado de alta intensidade (EIAI) em normotensos. Entretanto, existe uma lacuna no que se refere a HPE ambulatorial e ainda n?o ? conhecido se os modelos de EIAI de baixo volume s?o capazes de reduzir a press?o arterial (PA) ambulatorial em normotensos. Objetivo: investigar o efeito de uma sess?o de EIAI de baixo volume sobre a PA ambulatorial de normotensos. M?todos: vinte e um homens normotensos (23,6 ? 3,6 anos; 23,5 ? 2,3 kg/m2; PA de repouso 111,1 ? 6,4 / 62,4 ? 6,1 mmHg) realizaram: (i) teste incremental m?ximo; (ii) sess?o EIAI e controle (sem exerc?cio) em ordem randomizada. O EIAI consistiu de 10x60s a 100% da velocidade m?xima atingida no teste de esfor?o intercalado com 60s de recupera??o passiva. Os sujeitos permaneceram 20h com o aparelho de Monitoriza??o Ambulatorial da Press?o Arterial (MAPA). Foram avaliadas 13h de vig?lia e 7h de sono. O teste t de Student pareado foi utilizado para comparar a PA sist?lica e diast?lica entre as sess?es controle e EIAI. A ANOVA two-way (condi??o vs. tempo) foi usada para comparar a PA ambulatorial hora a hora ap?s as sess?es controle e EIAI. Resultados: a PA sist?lica no per?odo de 20h de an?lise reduziu 2,8 ? 3,7 mmHg e a PA diast?lica reduziu 1,7 ? 3,5 mmHg ap?s a sess?o de EIAI em rela??o ? sess?o controle (p<0,05). No per?odo da vig?lia, a PA sist?lica reduziu 3,2 ? 3,7 mmHg e a PA diast?lica 1,8 ? 3,9 mmHg ap?s a sess?o de EIAI em rela??o ? sess?o controle (p<0,05). N?o houve diferen?a na PA sist?lica e diast?lica durante o per?odo do sono (p>0,05). A ANOVA two-way demostrou que a PA sist?lica foi menor nas primeiras cinco horas ap?s a sess?o EIAI comparada a sess?o controle [delta m?nimo: -3,2 mmHg; delta m?ximo: -4,8 mmHg (p<0,05)]. Conclus?es: uma sess?o de EIAI de baixo volume reduziu a PA na vig?lia e no per?odo de 20h em normotensos. A hipotens?o em maior magnitude ocorrida nas primeiras cinco horas p?s-exerc?cio parecer explicar a redu??o da PA na vig?lia e no per?odo de 20h. / Introduction: Previous research have already shown the occurrence of post-exercise hypotension (PEH) after ~60 minutes of high-intensity interval exercise (HIIE) in normotensive subjects. However, there is a gap with regard to ambulatory PEH and it is not yet knowns if the low-volume HIIE reduces ambulatory blood pressure (BP) in normotensive subjects. Objective: To investigate the effect of a single session of low-volume HIIE on ambulatory BP in normotensive subjects. Methods: Twenty-one normotensive males (23.6 ? 3.6 years, 23.5 ? 2.3 kg/m2, resting PA 111.1 ? 6.4 / 62.4 ? 6.1 mmHg) performed: (i) maximum incremental test; (ii) HIIE and control sessions in a randomized order. The HIIE consisted of 10x60s at 100% of maximal velocity interspersed by 60s of passive recovery. The paired sample t-test was used to compare systolic and diastolic BP between control and HIIE sessions. A two-way ANOVA (condition vs. time) was used to compare the ambulatory BP response hour to hour following the control and HIIE sessions. Results: Systolic BP in the 20-hour analysis reduced 2.8 ? 3.7 mmHg and diastolic BP reduced 1.7 ? 3.5 mmHg after the HIIE session compared to the control session (p<0.05). In the awake period, systolic BP decreased 3.2 ? 3.7 mmHg and diastolic BP 1.8 ? 3.9 mmHg after the HIIE session compared to the control session (p<0.05). There was no difference in the systolic and diastolic BP during the asleep period (p> 0.05). The two-way ANOVA demonstrated that systolic BP was lower in the first five hours after the HIIE session compared to the control session [minimum delta: -3.2 mmHg; maximum delta: -4.8 mmHg (p <0.05)]. Conclusion: A single session of low-volume HIIE reduces ambulatory BP in normotensive. The greater magnitude of hypotension during the first five hours post-exercise seems to explain the BP reduction in 20h and awake periods.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23613 |
| Date | 31 August 2016 |
| Creators | Dantas, Teresa Cristina Batista |
| Contributors | 05304117417, http://lattes.cnpq.br/1216441676725839, Okano, Alexandre Hideki, 69806217934, http://lattes.cnpq.br/9586370984131426, Forjaz, Cl?udia L?cia de Moraes, 07675006879, http://lattes.cnpq.br/5131656525467473, Moraes, Daniel Umpierre de, 96937505000, http://lattes.cnpq.br/7262168077244929, Elsangedy, Hassan Mohamed, 04459139910, http://lattes.cnpq.br/7777329239184430, Moreira, S?rgio Rodrigues, 83971475949, http://lattes.cnpq.br/2184344969303945, Costa, Eduardo Caldas |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM EDUCA??O F?SICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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