The magnitude and duration of post exercise hypotension after land and water exercise

[摘要] ENGLISH ABSTRACT: It is well-known that acute and chronic aerobic and resistance exercise results indecreased blood pressure (BP) in hypertensive individuals. There is little evidencethat water exercise has a similar effect on BP response. There is also no certaintyregarding the magnitude and duration of post exercise hypotension (PEH) after eitherland or water-based exercise. Most studies were also performed under controlledlaboratory conditions and very few characterised the PEH response under real lifeconditions.The current study endeavoured to examine the magnitude and duration of PEH afteran acute session of water- and land-based exercise during free living conditions inpersons with mild to moderate hypertension.Twenty-one men and women (aged 52 ± 10 years) volunteered for the study. Allparticipants were pre-hypertensive or hypertensive. Participants completed a noexercise control session, a water exercise session and a combined aerobic andresistance land exercise session in random order. After all three sessions,participants underwent 24 hour monitoring using an Ergoscan ambulatory BPmonitoring device. Systolic blood pressure (SBP), diastolic blood pressure (DBP),mean arterial pressure (MAP) and heart rate (HR) were monitored to determinechanges from resting values after each session and to compare the PEH responsesbetween land and water exercise.Overall, the land exercise treatment caused a 3.6 mmHg lower average SBP over 24hours than the control treatment (P = 0.04). The average difference over 24 hoursbetween the water and control treatments was 2.2 mmHg and between land andwater exercise it was 1.5 mmHg (P > 0.05). During daytime, both land and waterexercise resulted in significantly lower SBP (12.7 and 11.3 mmHg) compared to thecontrol session (2.3 mmHg). The PEH response lasted for 24 hours after landexercise and nine hours after water exercise. There was no difference in the daytimeDBP for the three treatments (P > 0.05). Although all three groups showedsignificant reductions during night time, both exercise treatments showed greaternocturnal falls in SBP, DBP and MAP than the control treatment.

[发布机构] Stellenbosch University