Accuracy of Multisensor Activity Monitors in Normal Versus High BMI African American Children

作者：Arvidsson Daniel^*; Fitch Mark; Hudes Mark L; Fleming Sharon E

来源：Journal of Physical Activity and Health, 2011, 8(8): 1124-1134.

DOI：10.1123/jpah.8.8.1124

• physical activity
• energy expenditure
• validity
• indirect calorimetry
• treadmill
• walking

Background: Overweight children show different movement patterns during walking than normal-weight children, suggesting the accuracy of multisensory activity monitors may differ in these groups. Methods: Eleven normal and 15 high BMI African American children walked at 2, 4, 5, and 6 km/h on a treadmill wearing the Intelligent Device for Energy Expenditure and Activity (IDEEA) and SenseWear (SW). Accuracy was determined using indirect calorimetry and manually counted steps as references. Results: For IDEEA, no significant differences in accuracy were observed between BMI groups for energy expenditure (EE), but differences were significant by speed (+15% at 2 km/h to -10% at 6 km/h). For SW, EE accuracy was significantly different for high (+21%) versus normal BMI girls (-13%) at 2 km/h. For high BMI girls, EE was overestimated at low speed and underestimated at higher speeds. Underestimations in steps did not differ by BMI group at 4 to 6 km/h, but were significantly larger at 2 km/h than at the other speeds for all groups with IDEEA, and for normal BMI children with SW. Conclusions: Similar accuracies during walking may be expected in normal and overweight children using IDEEA and SW. Both monitors showed small errors for steps provided speed exceeded 2 km/h.

• 出版日期2011-11