Vigorous physical activity and longitudinal associations with cardiometabolic risk factors in youth

• Published in: International Journal of Obesity Vol. 38; no. 1; pp. 16 - 21
• Main Authors: Carson, V, Rinaldi, R L, Torrance, B, Maximova, K, Ball, G D C, Majumdar, S R, Plotnikoff, R C, Veugelers, P, Boulé, N G, Wozny, P, McCargar, L, Downs, S, Daymont, C, Lewanczuk, R, McGavock, J
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.01.2014; Nature Publishing Group
• Subjects: 692/699/317; 692/699/75; 692/700; Accelerometers; Accelerometry - methods; Adolescent; Alberta; Biological and medical sciences; Blood Pressure; Body Composition; Body Mass Index; Canada; Cardiovascular Diseases - etiology; Cardiovascular Diseases - prevention & control; Child; Children; Children & youth; Childrens health; Chronic diseases; Chronic illnesses; Cohort analysis; Consent; Epidemiology; Exercise; Female; Follow-Up Studies; Health aspects; Health Promotion and Disease Prevention; Health risks; Humans; Internal Medicine; Logistic Models; Male; Medical sciences; Medicine; Medicine & Public Health; Metabolic Diseases; Metabolic Diseases - etiology; Metabolic Diseases - prevention & control; Miscellaneous; Obesity; Pediatric Obesity - complications; Pediatric Obesity - prevention & control; pediatric-original-article; Pediatrics; Physical education; Physical Fitness; Physiological aspects; Prospective Studies; Public Health; Public health. Hygiene; Public health. Hygiene-occupational medicine; Risk Factors; School districts; School Health Services; Schools; Sex Distribution; Standard scores; Teenagers; Time Factors; Youth; Alberta; Canada; Edmonton Alberta Canada; Australia; Alberta Canada; New South Wales Australia; Canada, Alberta; adolescence; health; physical activity; Human; Physical exercise; Obesity; Nutrition; Nutrition disorder; Cardiovascular disease; Metabolic diseases; Association; Adolescent; Cardiovascular risk; Nutritional status; Public health
• ISSN: 0307-0565; 1476-5497
• DOI: 10.1038/ijo.2013.135

Objective: To examine the longitudinal associations between different physical activity (PA) intensities and cardiometabolic risk factors among a sample of Canadian youth. Methods: The findings are based on a 2-year prospective cohort study in a convenience sample of 315 youth aged 9–15 years at baseline from rural and urban schools in Alberta, Canada. Different intensities (light, moderate and vigorous) of PA were objectively assessed with Actical accelerometers. The main outcome measures were body mass index (BMI) z-score, waist circumference, cardiorespiratory fitness and systolic blood pressure at 2-year-follow-up and conditional BMI z-score velocity. A series of linear regression models were conducted to investigate the associations after adjusting for potential confounders. Results: At follow-up, cardiorespiratory fitness increased (quartile 1 vs quartile 4=43.3 vs 50.2; P trend <0.01) and waist circumference decreased (quartile 1 vs quartile 4=79.0 vs 72.6; P trend =0.04; boys only) in a dose-response manner across quartiles of baseline vigorous-intensity PA. A similar trend was observed for systolic blood pressure (quartile 1 vs quartile 4=121.8 vs 115.3 ; P trend =0.07; boys only). Compared with quartile 1 of vigorous-intensity PA, BMI z-score at follow-up and conditional BMI z-score velocity were significantly lower in the quartile 2 and 3 ( P <0.05). Waist circumference at follow-up also decreased (quartile 1 vs quartile 4=75.3 vs 73.8 ; P trend =0.04) across quartiles of baseline moderate-intensity PA. Conclusions: Time spent in vigorous-intensity PA was associated with several positive health outcomes 2 years later. These findings suggest that high-intensity activities in youth help to reduce the risk for several chronic diseases.