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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 …