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Assessing Child Obesity and Physical Activity in a Hard-to-Reach Population in California’s Central Valley, 2012–2013


This is a photograph of the Polar Active accelerometer watch, a wrist-worn, waterproof device, showing the device’s information display and control buttons.

Figure 1. Polar Active accelerometer watches used for 24/7 activity measurement for 134 children enrolled in Niños Sanos, Familia Sana (Healthy Children, Healthy Family), Central Valley, California, 2012–2013.

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Figure 2. Average moderate to vigorous activity (MVPA) (min/d) by BMI status for boys and girls. Differences were significant among girls (P = .05).

Weight Status Boys’ MVPA, min/d Girls’ MVPA, min/d
Healthy (<85th percentile) 83.1 72.1
Overweight (≥85th to <95th percentile) 96.3 55.4
Obese (≥95th percentile) 86.5 68.6

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Page last reviewed: July 23, 2015