Exercise-induced hypertension (EIH) is thought to be associated with increased
cardiovascular (CV) risks. However, no previous studies have investigated the
effects of EIH on CV systems in marathon runners without CV risk factors using
both 24-hr ambulatory blood pressure (BP) monitoring and exercise stress
echocardiography (ESE). This study firstly described differences in CV
adaptations according to EIH assessed by both exams. Marathon runners between 35
and 64 years of age without CV risk factors were eligible. All the participants
underwent both 24-hr ambulatory BP monitoring and ESE. EIH was defined as a
maximal exercise systolic BP≥210 mmHg. The EIH group (n=19) had shorter training
history and higher exercise intensity compared to the non-EIH group (n=23). The
average systolic BP was higher in the EIH group than in the non-EIH group. Left
cardiac chamber size and left ventricular mass (LVM) were also higher in the EIH
group compared to the non-EIH group. Maximal BP during ESE was positively
correlated with both parameters. Exaggerated BP response during exercise needs
to be monitored for pre-emptive measurements before it results in progressive
cardiovascular maladaptation.
Keywords
marathon - exercise-induced hypertension - cardiac remodeling - 24-hour ambulatory blood pressure - exercise stress echocardiography