Acute antihypertensive effect of self-selected exercise intensity in older women with hypertension: a crossover trial

Abstract

Purpose

Acute reduction in blood pressure (BP) following an exercise session is evidenced in controlled settings with formal supervision in hypertensive older populations. This study investigated the effect of a self-selected exercise (SSE)-intensity session on ambulatory BP in hypertensive older women in a “real-world” setting.

Methods

Twenty inactive older women with hypertension (64.9±4.5 years) were included in this randomized, controlled, crossover trial. After baseline assessments, participants performed 30 minutes of an SSE-intensity session on an outdoor track and a control session, separated by 7-10 days. Heart rate (HR), rating of perceived exertion (RPE), and affective response were assessed. Ambulatory BP was monitored for 20 hours following both sessions. Paired t-tests and generalized estimation were used for data analysis.

Results

Participants exercised at 5.1±1.1 km/h, spent ~90% of the exercise time at moderate–vigorous intensity (≥40% of heart rate reserve). SSE-intensity session was reported as light (RPE 11.0±1.5) and pleasant (affect 3.4±1.2). SSE-intensity session elicited reductions in systolic BP in the first 6 hours postexercise (6.0 mmHg, CI 2.7–9.3 mmHg; P<0.001). Average systolic BP in the 20-hour (−3.4 mmHg, CI −5.9 to −0.9 mmHg; P=0.010) and awake (−4.0 mmHg, CI −6.4 to −1.6 mmHg; P=0.003) periods were lower following SSE-intensity session compared to control session. No differences were observed in average systolic BP during asleep period and diastolic BP during the 20-hour awake and asleep periods between the SSE-intensity session and control session (P>0.05).

Conclusion

An SSE-intensity session elicited a reduction in ambulatory systolic BP in inactive older women with hypertension during awake and 20-hour periods. Also, the SSE-intensity session was reported as light and pleasant.

Keywords:

• physical activity
• blood pressure
• adherence
• affect
• elderly

Acknowledgments

Master’s degree scholarship granted by Coordination for the Improvement of Higher Education Personnel (CAPES, Brazil) to IBBC. All procedures were approved by the Ethics Committee of the Federal University of Rio Grande do Norte (protocol 1526048) and were carried out in line with the Declaration of Helsinki. The authors thank the cardiologist Bruno Erick de Barros Lucena to conduct the graded exercise test with the participants of the study.

Disclosure

The authors report no conflicts of interest in this work.

Supplementary material

Table S1 Ambulatory blood pressure monitoring per period following self-selected exercise-intensity and control sessions in inactive older women with hypertension