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Sitting in front of television for hours may elevate blood pressure

14 Apr 2018

Watching television for hours is associated with higher systolic (SBP) and diastolic blood pressure (DBP) in both men and women at most ages, suggests a recent study. On the other hand, increased physical activity may lower DBP, and high physical activity in young men may compensate for prolonged television time in terms of DBP.

An association existed between high physical activity and lower DBP (p=0.001), but not SBP. Active middle-aged men vs inactive participants had lower DBP (–1.1 mm Hg; 95 percent CI, –1.7 to –0.4).

In both sexes and in most age groups, prolonged television time correlated with higher SBP (p<0.001) and DBP (p=0.011). Three hours rather 1 hour of watching television per day could elevate SBP in middle-aged women (SBP, 1.1 mm Hg; 0.7–1.4) and men (SBP, 1.2 mm Hg; 0.8–1.6).

Of note, only in young men could a high physical activity (level 4 instead of 1) offset a prolonged television time (3 hours/day) with regard to DBP.

The investigators sought to determine if an interaction existed between sitting time and leisure time physical activity on BP, and if there were age and sex differences in this matter. They performed linear regression analysis on cross-sectional data in more than 45,000 men and women from two Swedish cohort studies (EpiHealth and LifeGene). Self-reported leisure time physical activity was given in five levels, from low (level 1) to vigorous physical activity (level 5), and television time was used as a proxy measure of sitting time.

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Most Read Articles
Tristan Manalac, 09 Sep 2018
Structured and remote patient management interventions are effective in reducing all-cause mortality and the number of days lost due to unplanned hospitalizations in heart failure patients, according to a recent study.
Radha Chitale, 08 Apr 2016
A trial assessing the implantable CardioFit® device designed to stimulate the parasympathetic nervous system in heart failure patients failed to meet its primary endpoints – reducing the rate of hospitalization due to heart failure or death by any cause.
27 Aug 2018
Obese men appear to have better ST-elevation myocardial infarction (STEMI) prognoses than their normal weight counterparts, regardless of metabolic syndrome status, a recent study has shown.
Stephen Padilla, 04 Sep 2018
The prevalence of individuals with hypertension is expected to rise significantly with the implementation of the 2017 American College of Cardiology (ACC)/American Heart Association (AHA) high blood pressure guidelines, according to a study.