- Title
- Physical activity intensity and cardiometabolic risk in youth
- Creator
- Hay, Jacqueline; Maximova, Katerina; Boule, Normand G.; Wozny, Paul; McCargar, Linda; Downs, Shauna; Lewanczuk, Richard; McGavock, Jonathan; Durksen, Anita; Carson, Valerie; Rinaldi, Randi Lynn; Torrance, Brian; Ball, Geoff D. C.; Majumdar, Sumit R.; Plotnikoff, Ronald C.; Veugelers, Paul
- Relation
- Archives of Pediatrics and Adolescent Medicine Vol. 166, Issue 11, p. 1022-1029
- Publisher Link
- http://dx.doi.org/10.1001/archpediatrics.2012.1028
- Publisher
- American Medical Association
- Resource Type
- journal article
- Date
- 2012
- Description
- Objective: To determine the association between physical activity (PA) intensities and cardiometabolic risk factors in youth. Design: Cross-sectional study using data from the 2008 Healthy Hearts Prospective Cohort Study of Physical Activity and Cardiometabolic Health in Youth. Setting: Rural and urban communities in Alberta, Canada. Participants: A convenience sample of 605 youth aged 9 to 17 years. Youth were on average aged 12.1 years, 248 were boys (41%), and 157 were overweight or obese (26%). Main Exposure: Actical accelerometer–measured PA intensity. Main Outcomes Measures: The primary outcome was body mass index (calculated as weight in kilograms divided by height in meters squared) z score. Secondary outcome measures included waist circumference, systolic blood pressure, and cardiorespiratory fitness (maximal oxygen consumption [[Vdot]O2max]). Results: Body mass index z score, waist circumference, and systolic blood pressure decreased and [Vdot]O2max increased in a dose-response manner across tertiles of vigorous PA (adjusted P < .001). No significant differences in cardiometabolic risk factors were seen across tertiles of moderate or light PA in multivariable analyses. Achieving more than 7 minutes of vigorous PA daily was associated with a reduced adjusted odds ratio of overweight status (0.56; 95% CI, 0.33-0.95) and elevated systolic blood pressure (0.36; 95% CI, 0.16-0.79). The odds of overweight status and elevated blood pressure decreased with increasing time and intensity of PA. Conclusions: Only vigorous PA was consistently associated with lower levels of waist circumference, body mass index z score, systolic blood pressure, and increased cardiorespiratory fitness in youth. These findings underscore the importance of vigorous PA in guidelines for children and adolescents.
- Subject
- physical activity; cardiometabolic risk factors; PA intensity
- Identifier
- http://hdl.handle.net/1959.13/1303715
- Identifier
- uon:20708
- Identifier
- ISSN:1072-4710
- Language
- eng
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