Habitual Moderate-to-Vigorous Physical Activity is Inversely Associated With Insulin Resistance in Canadian First Nations Youth

in Pediatric Exercise Science
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The aim of this study was to explore the relationship between insulin resistance (IR) and objectively measured habitual moderate-to-vigorous physical activity (MVPA) in First Nations youth. A cross-sectional study was conducted in 2 rural villages in northern British Columbia, Canada. Thirty-nine healthy youth (16 males and 23 females; age = 11.8yrs ± 2.2; range = 8.8–18.5yrs) participated. PA was measured with ActiGraph GT1M accelerometers. The homeostasis model assessment estimate of IR (HOMA-IR) was used to define IR. Duration of MVPA was inversely related to HOMA-IR (r=−.44, p < .01). From the regression model, 30 min of habitual MVPA corresponded to HOMA-IR levels that were 15% lower. In conclusion, these findings suggest that active First Nations youth have lower HOMA-IR values.

Mitchell, Gaul, and Naylor are with the School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, British Columbia, Canada. Panagiotopoulos is with the Endocrine and Diabetes Unit, Dept. of Pediatrics, University of British Columbia, and British Columbia Children’s Hospital, Vancouver, Canada.

Pediatric Exercise Science