Physical activity and sedentary behaviour at different life stages and adult blood pressure in the 1958 British cohort

Theodora Pouliou, Myung Ki, Catherine Law, Leah Li, Chris Power

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Objectives: To investigate whether physical activity or sedentary behaviour at different life stages is associated with blood pressure (BP) in mid-adulthood; activity levels have accumulative associations with BP; and adult body mass index (BMI) mediates associations. Methods: Information on activity and television-viewing was available at several ages (23, 33, 42, 45 years) and BP at 45 years for the 1958 British birth cohort (n=9927). Associations were examined with and without adjustment for covariates. Results: Active adults, generally, had lower mean systolic and diastolic BP and risk of hypertension than nonactive, although varying by age. After adjustment for covariates, systolic and diastolic BP for active men at 23 years or at 45 years were 1-2 mmHg lower; similar associations were seen for women active at 33 years. Some but not all associations attenuated with further adjustment for BMI: odds ratio (OR) for hypertension associated with 23 years activity changed from 0.82 [95% confidence interval (CI) 0.74, 0.91] to 0.79 (0.70, 0.90) after BMI adjustment. Independent associations of activity at more than one age were found, such that prevalence of hypertension was higher in men active at 23 years but not at 45 years, than men sustaining activity (39 vs. 31%). Sitting at work was unrelated to BP, but there was a trend of higher BP with greater television-viewing: for example risk of hypertension was higher by 10-12% per h/day television-viewing at 45 years after adjustment for covariates, attenuating after allowance for BMI. Conclusion: Our study suggests that there are benefits to BP of becoming and sustaining active lifestyles and minimizing television-viewing over many years of adulthood, with a mediating role for BMI.

Original languageEnglish
Pages (from-to)275-283
Number of pages9
JournalJournal of Hypertension
Volume30
Issue number2
DOIs
Publication statusPublished - 2012 Feb

Keywords

  • birth cohort
  • blood pressure
  • body mass index
  • hypertension
  • physical activity
  • sedentary behaviour

ASJC Scopus subject areas

  • Internal Medicine
  • Physiology
  • Cardiology and Cardiovascular Medicine

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