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Physical activity and sedentary behavior thresholds for identifying childhood hypertension and its phenotypes: The

Kalliopi Karatzi1, George Moschonis2, Sofia Botelli1

  • 1Department of Nutrition and Dietetics, School of Health Science & Education, Harokopio University of Athens, Greece.

Journal of the American Society of Hypertension : JASH
|August 18, 2018
PubMed

Insights

Increased physical activity and reduced sedentary behavior are linked to lower hypertension risk in children. Specific thresholds for daily steps, moderate-to-vigorous activity, and screen time identify children at higher risk for hypertension.

Area of Science:

  • Pediatrics
  • Cardiology
  • Public Health

Background:

  • Hypertension phenotypes are poorly understood despite potential differences in pathophysiology and clinical outcomes.
  • Investigating lifestyle factors like physical activity and sedentary behavior is crucial for understanding childhood hypertension.

Purpose of the Study:

  • To examine the associations between physical activity, sedentary behavior, and hypertension phenotypes in Greek schoolchildren.
  • To identify risk thresholds for hypertension based on these lifestyle factors.

Main Methods:

  • A cross-sectional study of 2473 schoolchildren aged 9-13 years.
  • Data collected included physical activity (steps/day, moderate-to-vigorous physical activity - MVPA), sedentary behavior (screen time), blood pressure, and anthropometry.

Main Results:

  • Hypertensive children had lower physical activity levels. Boys with isolated systolic hypertension (ISH) had higher screen time.
  • Increased physical activity was associated with 33%-54% lower risk of all hypertension phenotypes. Increased MVPA showed even greater risk reduction (41%-65%).
  • Higher sedentary time in boys was linked to an 11%-13% increased risk of ISH and systolic and diastolic hypertension (SDH). Identified thresholds: 12,378 steps/day, 47.3 min/day MVPA, 2.9 h/day sedentary behavior.

Conclusions:

  • Physical activity is inversely associated with hypertension phenotypes in children.
  • Sedentary behavior is positively associated with ISH and SDH in boys.
  • Identified cutoff values require confirmation for use in childhood hypertension prevention programs.

Keywords:
Childhood hypertensionhypertension phenotypesphysical activitysedentary behavior

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