Relationship between Aerobic Exercise Training and Nocturnal Blood Pressure Non-dipping Status in Normotensive Adults
Background: The absence of blood pressure decrease during the night (non-dipping) is associated with cardiovascular disease (CVD) morbidity and mortality. Lack of exercise or sedentary lifestyle has been recognized as a risk factor for CVD and most recommendations suggest aerobic exercise as a strategy for prevention. The purpose of this study was to assess the relationship between aerobic exercise training (AEXT) and non-dipping type of blood pressure in normotensive individuals.
METHODS: The study population included 22 sedentary healthy individuals with normal blood pressure but had a nocturnal fall of systolic BP < 10% of the daytime values (non-dipping). All of them underwent ambulatory blood pressure monitoring for 24 hours before and after 6 months moderate-intensity AEXT (40 min/day, 3 sessions/week). An ambulatory BP monitor was worn on the non-dominant arm and the BP measurement interval was set at 30-min during the daytime (6 AM to 11 PM) and 60-min during the night time (11 PM to 6 AM).
RESULTS: No significant difference was observed with regard, office blood pressure, plasma concentrations of cholesterol, or inflammatory status following the 6 months exercise training. The values of BMI, glucose, and triglyceride were significantly decreased and VO2max was significantly improved at the final tests. Compared to baseline (N=22), there were fewer subjects categorized as non-dipper (N=15). For the entire group, the percentage of nocturnal fall of systolic BP following aerobic exercise training was significantly increased (Baseline: 5.0 ± 3.1 % vs. Final: 8.0 ± 3.4 %, P=0.02).
CONCLUSION: The deficiency of the nocturnal fall of systolic BP can be improved by moderate-intensity AEXT. AEXT can decrease the risk factor of CVD through amplifying the night time reduction of BP in normotensive individuals.
Medicine & Science in Sports & Exercise
Digital Object Identifier (DOI)
Ling C, Diaz KM, Kretzschmar J, Feairheller DL, Sturgeon KM, Williamson S, Veerabhadrappa P, Perkins A, Lee H, Grimm H, Babbitt D, Brown MD. Relationship Between Aerobic Exercise Training and Nocturnal Blood Pressure Non-dipping Status in Normotensive Adults. Medicine & Science in Sports & Exercise. 45:5. Supp. 2013.
© 2013 American College of Sports Medicine