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Research Study Abstract
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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.
Author(s)
- 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
Institution(s)
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1
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2 School of Education, Physical Activity and Sport Science, Department of Social Sciences, University of Vic, Barcelona, Spain
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3 Cuenca III Health Center, Castilla la Mancha Health Service (SESCAM), Cuenca, Spain
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4 Casa de Barco Health Center, Castilla y León Health Service (SACYL), Valladolid, Spain
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5 Torre Ramona Health Center, Aragón Health Service–Salud, Zaragoza, Spain
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6 Primary Care Research Unit of Bizkaia, Basque Health Service-Osakidetza, Bilbao, Spain
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EVIDENT Group: Red de Investigación en Actividades Preventivas y Promoción de la Salud (Research Network on Preventive Activities and Health Promotion), Spain
Journal
American Journal of Hypertension