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Abstract(s)
A realização de uma única sessão de exercício físico é uma das formas de fazer baixar a pressão arterial por algumas horas após a sua realização. No entanto, ainda não se conhece na totalidade a resposta da hipotensão pós-exercício em função de algumas caraterísticas do exercício físico, nomeadamente da intensidade, da duração, do tipo de exercício, entre outros. Existe, portanto, uma necessidade de perceber melhor o efeito de diferentes intensidades de exercício na variação dos valores da pressão arterial de repouso pós-exercício.
Objetivos: Verificar se duas sessões de exercício físico a 30 e 60% da frequência cardíaca de reserva induzem hipotensão pós exercício em idosos praticantes de exercício físico regular, e averiguar a existência de possíveis diferenças nos valores da pressão arterial de repouso pós-exercício entre ambas as intensidades.
Metodologia: A amostra foi constituída por 19 sujeitos idosos de ambos os sexos (12 mulheres e 7 homens, 10 com hipertensão, 9 sem, média de idades: 66±7,52), os quais realizaram duas sessões de exercício aeróbio, uma a 30% e outra a 60% das suas frequências cardíacas de reserva respetivas, por 30 minutos, numa passadeira rolante, onde nos primeiros 5 minutos foi feita uma ativação funcional de modo a que os mesmos atingissem a intensidade pretendida e nos últimos 5 foi realizado o retorno à calma. Os valores da pressão arterial e frequência cardíaca foram recolhidos antes, durante, imediatamente após, 1,2,3,4,5 e 6 horas após a realização de cada sessão de exercício.
Resultados: Na intensidade de 30% não se observaram diferenças estatisticamente significativas quanto à pressão arterial, quer sistólica, quer diastólica, relativamente aos valores de repouso, enquanto que na intensidade de 60% foram observadas diferenças estatisticamente significativas na pressão arterial sistólica às 1,5 e 6 horas após a realização da sessão e na pressão arterial diastólica no momento imediatamente após a realização da sessão, em relação aos valores de repouso.
Conclusão: Uma única sessão de exercício realizada a 60% da frequência cardíaca de reserva induz diminuições estatisticamente significativas da pressão arterial em relação aos valores de repouso. A maior intensidade de exercício parece ser um fator crucial para o efeito hipotensivo motivado pela realização de exercício físico.
A single bout of exercise is one of the ways to lower blood pressure for a few hours after its completion. Even so, it’s not fully known yet how the post-hypotension response regarding some characteristics of the exercise, such as intensity, duration, type of exercise, among others, induce a greater or lesser post-exercise hypotension. Therefore, there is a necessity of better understanding the effect of different exercise intensities in the discrepancies of post-exercise blood pressure values. Objectives: Verify if two sessions of exercise of 30 and 60% of the heart rate reserve induce post-exercise hypotension in regularly exercised old aged people, and check the existence of possible differences in post-exercise rest blood pressure values between both intensities. Methods: The sample was based on 19 old aged people from both sexes (12 women, 7 men, 10 with hypertension, 9 without, 66±7.52 years old) which were submitted to two sessions of aerobic exercise, one of 30% and another of 60% of their respective heart rate reserve, for 30 minutes, on a treadmill, in which the first 5 minutes a warmup was done in order for them to get to the pretended intensity, and in the last 5 minutes the cooldown phase was done. The blood pressure and heart rate values were assessed before, during, right after, 1.2.3.4.5 and 6 hours after each exercising session. Results: In the intensity of 30% no statistical differences were observed for the blood pressure, either systolic or diastolic, in comparison to the rest values, whereas for the intensity of 60% there were significant statistical differences in the systolic blood pressure at 1,5 and 6 hours after exercising and in the diastolic blood pressure in the moment right after exercising, in comparison to rest values. Conclusion: A single bout of exercise, done at 60% of the heart rate reserve, induces significant statistical decreases of blood pressure in comparison to the rest values. Higher intensities in exercise sessions seem to be a crucial factor for the hypotensive effect caused by the practice of physical exercise.
A single bout of exercise is one of the ways to lower blood pressure for a few hours after its completion. Even so, it’s not fully known yet how the post-hypotension response regarding some characteristics of the exercise, such as intensity, duration, type of exercise, among others, induce a greater or lesser post-exercise hypotension. Therefore, there is a necessity of better understanding the effect of different exercise intensities in the discrepancies of post-exercise blood pressure values. Objectives: Verify if two sessions of exercise of 30 and 60% of the heart rate reserve induce post-exercise hypotension in regularly exercised old aged people, and check the existence of possible differences in post-exercise rest blood pressure values between both intensities. Methods: The sample was based on 19 old aged people from both sexes (12 women, 7 men, 10 with hypertension, 9 without, 66±7.52 years old) which were submitted to two sessions of aerobic exercise, one of 30% and another of 60% of their respective heart rate reserve, for 30 minutes, on a treadmill, in which the first 5 minutes a warmup was done in order for them to get to the pretended intensity, and in the last 5 minutes the cooldown phase was done. The blood pressure and heart rate values were assessed before, during, right after, 1.2.3.4.5 and 6 hours after each exercising session. Results: In the intensity of 30% no statistical differences were observed for the blood pressure, either systolic or diastolic, in comparison to the rest values, whereas for the intensity of 60% there were significant statistical differences in the systolic blood pressure at 1,5 and 6 hours after exercising and in the diastolic blood pressure in the moment right after exercising, in comparison to rest values. Conclusion: A single bout of exercise, done at 60% of the heart rate reserve, induces significant statistical decreases of blood pressure in comparison to the rest values. Higher intensities in exercise sessions seem to be a crucial factor for the hypotensive effect caused by the practice of physical exercise.
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Keywords
Hipotensão pós-exercício Intensidade de exercício Exercício aeróbio