Association between time spent in sedentary, moderate to vigorous physical activity, body mass index, cardiorespiratory fitness and blood pressure.
BACKGROUND
Elevated blood pressure (BP) has been reported in young people and seems to be associated with body mass index (BMI) and reduced physical activity (PA).


OBJECTIVE
This study sought to analyse the association of BP with BMI, PA intensity patterns and cardiorespiratory fitness (CRF) in youth.


METHODS
A cross-sectional study was carried out including 66 boys (13.91+/-1.76) and 97 girls (14.02+/-1.71). Anthropometric characteristics, CRF and BP were assessed during school time and accelerometers were utilized to determine intensity of PA.


RESULTS
The linear regression model, adjusted for age, sex and height, showed that higher values of BMI were associated (p<or=0.05) with higher values of systolic blood pressure (SBP) (1.39; 95% CI: 0.56; 2.23) and diastolic blood pressure (DBP) (1.52; 95% CI: 0.68; 2.37). Additionally, SBP, but not DBP, was inversely associated (p<or=0.05) with moderate PA (-0.25; 95% CI: -0.47; -0.02) and positively correlated with sedentary activities (0.04; 95% CI: 0.00; 0.08).


CONCLUSIONS
The present study showed that BMI and time spent in sedentary activities were inversely associated with SBP. However, time spent in moderate PA was positively associated with SBP. BMI was the single predictor of DBP.
Gaya
Anelise Reis
AR
FADE-UP, Research Centre in Physical Activity Health and Leisure, Porto, Portugal. anegaya@fade.up.pt
Alves
Alberto
A
Aires
Luisa
L
Martins
Clarice Lucena
CL
Ribeiro
José Carlos
JC
Mota
Jorge
J
D000293:Adolescent; D000375:Aging / Q000502:physiology; D000886:Anthropometry; D001794:Blood Pressure / Q000502:physiology*; D001827:Body Height; D015992:Body Mass Index; D002648:Child; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010809:Physical Fitness / Q000502:physiology*; D012044:Regression Analysis; D012146:Rest / Q000502:physiology*; D012727:Sex Characteristics; D013997:Time Factors