Intra-Arterial Blood Pressure Response in Hypertensive Subjects during Low- and High-Intensity Resistance Exercise

Abstract

OBJECTIVE:The aim of this study was to describe blood pressure responses during resistance exercise in hypertensive subjects and to determine whether an exercise protocol alters these responses.INTRODUCTION:Resistance exercise has been recommended as a complement for aerobic exercise for hypertensive patients. However, blood pressure changes during this kind of exercise have been poorly investigated in hypertensives, despite multiple studies of normotensives demonstrating significant increases in blood pressure.METHODS:Ten hypertensive and ten normotensive subjects performed, in random order, two different exercise protocols, composed by three sets of the knee extension exercise conducted to exhaustion: 40% of the 1-repetition maximum (1RM) with a 45-s rest between sets, and 80% of 1RM with a 90-s rest between sets. Radial intra-arterial blood pressure was measured before and throughout each protocol.RESULTS:Compared with normotensives, hypertensives displayed greater increases in systolic BP during exercise at 80% (+80±3 vs. +62±2 mmHg, P<0.05) and at 40% of 1RM (+75±3 vs. +67±3 mmHg, P<0.05). In both exercise protocols, systolic blood pressure returned to baseline during the rest periods between sets in the normotensives; however, in the hypertensives, BP remained slightly elevated at 40% of 1RM. During rest periods, diastolic blood pressure returned to baseline in hypertensives and dropped below baseline in normotensives.CONCLUSION:Resistance exercise increased systolic blood pressure considerably more in hypertensives than in normotensives, and this increase was greater when lower-intensity exercise was performed to the point of exhaustion.

Efeito do intervalo de recuperação fixo e autossugerido entre séries do exercício resistido sobre o comportamento cardiovascular pós-esforço

“…This is because the variables mentioned cause distinct effects on some physiological systems. For instance, blood pressure (BP) is known to increase during exercise according to the load applied 7 , leading to major cardiac overload. This cardiac overload increase is important to meet the demands of the exercise, but should be observed and controlled in hypertensive individuals 7 .…”

“…For instance, blood pressure (BP) is known to increase during exercise according to the load applied 7 , leading to major cardiac overload. This cardiac overload increase is important to meet the demands of the exercise, but should be observed and controlled in hypertensive individuals 7 . Nevertheless, some resistance-related variables, such as the rest interval between series, still need further investigation.…”

Reprodutibilidade da medida da pressão arterial auscultatória durante o exercício de Força.

“…Todavia, se por um lado, o exercício de força pode trazer benefícios para a aptidão física, por outro lado, durante a sua realização ocorre aumento acentuado da pressão arterial (PA) 2,3 , o que pode representar risco para a saúde dos indivíduos, especialmente aqueles com doenças cardiovasculares. Consequentemente, a monitorização dos níveis de PA durante o exercício de força tem sido recomendada para minimizar o risco cardiovascular durante essa atividade.…”

“…A medida acurada da PA durante o exercício de força pode ser obtida através dos métodos intra-arterial [3][4] e fotopletismografia de oclusão de dedo 5 . Todavia, como essas técnicas são invasivas (intra-arterial) ou envolvem alto custo operacional (fotoplestismografia e oclusão de dedo), sua aplicabilidade prática é limitada.…”

Finger Blood Pressure During Leg Resistance Exercise

“…However, to the best of our knowledge, up to now no previous study has compared FPP BP values with the ones obtained with intra-arterial measurement during resistance exercise. As in clinical settings cardiovascular risk is mainly attributed to a huge increase in BP, it is especially important to establish this comparison in subjects who achieve higher BP levels during this kind of exercise, which has been reported in hypertensive individuals [18] . Therefore, the aim of the present study was to compare FPP and intra-arterial BP values and Abstract ▼…”