Key result
Obesity and low physical activity were associated with higher blood pressure, with obese youth having an 8 mm Hg higher systolic blood pressure than normal weight youth.
Why the study?
What is the independent and combined association of physical activity and BMI with blood pressure in US youth?
Cross-Sectional (n=2,585)
Yes
What is the independent and combined association of physical activity and BMI with blood pressure in US youth?
Both BMI and physical activity have significant independent and combined associations with blood pressure in youth, highlighting the importance of reducing adiposity to lower cardiovascular risk.
Answers are grounded in this paper and cite their sources.
May support targeting obesity and inactivity to address youth BP elevation; leaves open causality and intervention effects.
PURPOSE: The objective of this study was to examine the independent and combined association of physical activity and body mass index (BMI) with blood pressure in youth. METHODS: Youth aged 8-18 years from the 2003-2006 National Health and Nutrition Examination Survey (NHANES) with BMI, blood pressure, and physical activity (accelerometer) were included in the analyses. A total of 2585 subjects (1303 males; 47% of all 8- to 18-year-olds) met these criteria. RESULTS: Obese youth had a systolic blood pressure that was 8 mm Hg higher than normal weight youth. A significant interaction between BMI and physical activity on blood pressure was found (P < .001), and group differences among the BMI/activity groups showed that the 3 obese groups and the overweight/least active group had significantly higher systolic blood pressure than the normal weight/active group across all analyses. The overweight/least active and normal weight/least active groups had significantly higher diastolic blood pressure than the normal weight/active group as well. CONCLUSIONS: This study showed a significant independent and combined association of BMI and physical activity with blood pressure in youth. Interventions need to focus on the reduction of fatness/BMI as a way to reduce the cardiovascular risk in youth.
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Betz et al. (2018) conducted a cross-sectional in Blood pressure (n=2,585). Body mass index and physical activity vs. Normal weight and active youth was evaluated on Blood pressure (MD 8 mm Hg, p=<.001). Obesity and low physical activity were associated with higher blood pressure, with obese youth having an 8 mm Hg higher systolic blood pressure than normal weight youth (P<0.001 for interaction).
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