Alamedilla Health Center, Castilla y León Health Service (SACYL), Instituto de Investigación Biosanitario de Salamanca (IBSAL), Salamanca, Spain;
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Blood Pressure Circadian Pattern and Physical Exercise Assessment by Accelerometer and 7-Day Physical Activity Recall Scale.
- Published on Aug. 24, 2013
Background The relationship between regular physical activity, measured objectively and by self-report, and the circadian pattern of 24-hour ambulatory arterial blood pressure (BP) has not been clarified.
Methods We performed a cross-sectional study in a cohort of healthy patients. We included 1,345 patients from the EVIDENT study (mean age 55±14 years; 59.3% women). Physical activity was assessed using the 7-day physical activity recall (PAR) questionnaire (metabolic equivalents (MET)/hour/week) and the Actigraph GT3X accelerometer (counts/minute) for 7 days; ambulatory arterial BP was measured with a radial tonometer (B-pro device).
Results The dipper-pattern patients showed a higher level of activity than nondipper patients, as assessed by accelerometer and 7-day PAR. Physical activity measures correlated positively with the percent drop in systolic BP (SBP; ρ = 0.19 to 0.11; P < 0.01) and negatively with the systolic and diastolic sleep to wake ratios (ρ = -0.10 to -0.18; P < 0.01) and heart rate (ρ = -0.13; P < 0.01). In logistic regression, considering the circadian pattern (1, dipper; 0, nondipper) as the dependent variable, the odds ratio of the third tertile of counts/minute was 1.79 (95% confidence interval [CI], 1.35-2.38; P < 0.01) and of MET/hour/week was 1.33 (95% CI, 1.01-1.75; P = 0.04) after adjustment for confounding variables.
Conclusions Physical activity, as evaluated by both the accelerometer and the 7-day PAR, was associated with a more marked nocturnal BP dip and, accordingly, a lower SBP and diastolic BP sleep to wake ratio.
Clinical Trial Registration Clinical Trials.gov Identifier: NCT01083082.
- Luis García-Ortiz 1
- José I Recio-Rodríguez 1
- Anna Puig-Ribera 2
- Jorge Lema-Bartolomé 3
- Elisa Ibáñez-Jalón 4
- Natividad González-Viejo 5
- Nahia Guenaga-Saenz 6
- Cristina Agudo-Conde 1
- Maria C. Patino-Alonso 1
- Manuel A. Gomez-Marcos 1
- EVIDENT Group 7
School of Education, Physical Activity and Sport Science, Department of Social Sciences, University of Vic, Barcelona, Spain
Cuenca III Health Center, Castilla la Mancha Health Service (SESCAM), Cuenca, Spain
Casa de Barco Health Center, Castilla y León Health Service (SACYL), Valladolid, Spain
Torre Ramona Health Center, Aragón Health Service–Salud, Zaragoza, Spain
Primary Care Research Unit of Bizkaia, Basque Health Service-Osakidetza, Bilbao, Spain
EVIDENT Group: Red de Investigación en Actividades Preventivas y Promoción de la Salud (Research Network on Preventive Activities and Health Promotion), Spain
American Journal of Hypertension