Till Örebro universitet

Purpose: Arterial stiffness describes the rigidity of the arterial walls and is associated withrisk factors for cardiovascular disease (CVD). Arterial stiffness predicts future events andmortality, and the predictive value is stronger in younger versus older subjects. The aims ofthe present study were, firstly, to present data on physical activity (PA) and time spentsedentary, in the population of Swedish, young adults. Secondly, to explore the associationbetween PA and arterial stiffness.

Material and Methods: Self-reported healthy, non-smoking, Swedish, young adults, 18–25years old, participated in the cross-sectional Lifestyle, Biomarkers and Atherosclerosis(LBA) study. The daily PA was objectively measured with an accelerometer for 1 week.Of the 834 participants, 658 individuals had valid registrations. The arterial stiffness measures, pulse wave velocity (PWV) and augmentation index (AIx) were measured withapplanation tonometry.

Results: Women were on overall more physically active than men, they spent 214 min/dayin light PA (LPA) compared to men who spent 202 min/day. Women took significantly moresteps per day than men, 7796 vs 7336 steps/day, and spent less time sedentary, 523 min/day,compared to men who spent 547 min/day sedentary. In total, 76% of the individuals spent onaverage at least 30 minutes per day in the recommended moderate and vigorous PA (MVPA).Lower arterial stiffness was associated with more MVPA and total PA in the total population.

Conclusion: We conclude that in this age group of young, self-reported healthy adults18–25 years, it is important to highlight the health-enhancing possibilities of time spent inphysical activity on the vascular function, measured as PWV and AIx. It is of high relevancein a public health perspective to expand preventive efforts beyond the high-risk groups andencourage young adults to be physically active.