Light-Intensity Physical Activity and Sedentary Behavior Are Associated With Blood Pressure Levels in Adolescents

Area of Science:

• Adolescent health
• Cardiovascular research
• Exercise physiology

Background:

• Elevated blood pressure in adolescence is a predictor of adult hypertension.
• Understanding the impact of physical activity (PA) and sedentary behavior (SB) on blood pressure (BP) is crucial for cardiovascular health.
• Sex-specific differences in PA, SB, and BP associations require further investigation.

Purpose of the Study:

• To examine the relationship between different intensities of physical activity (PA), sedentary behavior (SB), and blood pressure (BP) in adolescents.
• To determine if these associations differ by sex.

Main Methods:

• Cross-sectional study of 95 adolescents aged 15-18 years.
• Objective measurement of PA intensities (light, moderate-to-vigorous, vigorous) and SB using accelerometry.
• Automated measurement of systolic and diastolic blood pressure.

Main Results:

• In adolescent boys, increased time in light-intensity physical activity (LPA) was associated with lower systolic blood pressure (SBP).
• In adolescent boys, increased time spent in sedentary behavior (SB) was associated with higher SBP.
• An interaction effect in boys indicated that higher moderate-to-vigorous physical activity (MVPA) attenuated the positive association between SB and SBP.

Conclusions:

• Promoting light physical activity and reducing sedentary behavior may be beneficial for lowering systolic blood pressure in adolescent males.
• Moderate-to-vigorous physical activity plays a role in mitigating the negative effects of sedentary behavior on blood pressure.
• These findings highlight the importance of tailored PA recommendations for adolescent cardiovascular health, considering sex and behavior patterns.