Key result
The amount of time spent exercising in the target heart rate zone was inversely associated with systolic blood pressure change one year following a cardiac event.
Why the study?
It was unknown whether the amount of time exercising in the target heart rate zone influences blood pressure changes one year following a cardiac event.
Does the amount of time spent in the target heart rate zone during lifestyle exercise reduce blood pressure in patients following a cardiac event?
Observational (n=331)
Does the amount of time spent in the target heart rate zone during lifestyle exercise reduce blood pressure in patients following a cardiac event?
Greater time spent in the target heart rate zone during lifestyle exercise is associated with improved systolic blood pressure one year after a cardiac event.
May warrant intensity monitoring in post-event exercise; leaves open whether targeting heart rate zones improves BP control.
The purpose of this study was to investigate whether the amount of time participants exercised in the target heart rate zone (THRZ) influenced change in blood pressure (BP) one year following a cardiac event. Lifestyle exercise (habitual, small exercise opportunities) and intensity were objectively measured using portable heart rate monitors. Linear mixed models were used to analyze change in BP among 331 participants. Mean BP at baseline was 118/70 mmHg, and both systolic and diastolic BP increased from baseline to one year—4.79 mmHg ( p <.001) and 2.09 mmHg ( p =.002), respectively. Overall, participants had a decrease in levels of lifestyle exercise. After controlling for time, age, gender, and study group, SBP change was inversely associated with amount of time in THRZ. Given suboptimal engagement in recommended exercise, the underlying mechanisms of lifestyle exercise effects on the time spent in THRZ to reduce BP warrants further study in this population.
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Still et al. (2020) conducted an observational in Post-cardiac event (n=331). Time exercised in the target heart rate zone (THRZ) was evaluated on Change in blood pressure (BP). The amount of time spent exercising in the target heart rate zone was inversely associated with systolic blood pressure change one year following a cardiac event.
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