Similarly, following adjustment, significant odds ratios were found for current smokers, people undertaking moderate physical activity and for people undertaking vigorous levels of physical activity (model 3, table 5).
For each domain, participants recorded the number of days and time spent each day undertaking vigorous and moderate-intensity activities separately along with the time spent walking.
45 For determining whether a respondent was sufficiently physically active to meet minimum recommended guidelines for health benefits, time spent undertaking vigorous activity was assigned a double weighting.
Despite these differences, the proportion of adults estimated to engage in regular physical activity were similar in the two studies: in the 2002 Eurobarometer, only 3.5% of the survey population undertook vigorous activities more than 2 hours per week, whereas in our study, only 5% of the Greek female population undertook such vigorous activities.
A significantly higher proportion of children in the LEAP intervention were also observed undertaking vigorous intensity PA compared to children in the control school 7-weeks and 8-months after baseline.
In addition, the children were asked about the frequency with which they undertook vigorous exercise, for at least half an hour, during the preceding 3 months and were categorized into 3 groups (0 2, 3 4, and 5 7 times a week).
In addition, the median 25(OH D concentrations were, with few exceptions among the cases and controls of the HAPIEE cohorts, increasing with categories of education, lowest in obese individuals, lowest in current smokers, and higher among subjects who undertook vigorous physical activity.
Participants reported time spent in a usual week undertaking vigorous-intensity physical activity (VPA) for recreation, health, or fitness, inside and outside of their neighbourhood (within a 15 min walk of home).
