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

2011 ◽  
Vol 8 (8) ◽  
pp. 1124-1134 ◽  
Author(s):  
Daniel Arvidsson ◽  
Mark Fitch ◽  
Mark L. Hudes ◽  
Sharon E. Fleming
Keyword(s):  
African American ◽  
Energy Expenditure ◽  
Indirect Calorimetry ◽  
Normal Weight ◽  
The Other ◽  
African American Children ◽  
Overweight Children ◽  
Activity Monitors ◽  
American Children ◽  
High Bmi

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.

Accelerometer Response to Physical Activity Intensity in Normal-Weight Versus Overweight African American Children

2011 ◽  
Vol 8 (5) ◽  
pp. 682-692 ◽  
Author(s):  
Daniel Arvidsson ◽  
Mark Fitch ◽  
Mark L. Hudes ◽  
Catrine Tudor-Locke ◽  
Sharon E. Fleming
Keyword(s):  
Physical Activity ◽  
African American ◽  
Weight Status ◽  
Normal Weight ◽  
Fat Free Mass ◽  
African American Children ◽  
Overweight Children ◽  
Physical Activity Intensity ◽  
Activity Intensity ◽  
American Children

Background:Different movement efficiency in overweight children may affect accelerometer output data. The purpose was to investigate the ability of accelerometers to assess physical activity intensity and number of steps in normal-weight compared with overweight children.Methods:Eleven normal-weight and 14 overweight African American children walked at 2, 4, 5, and 6 km/h on a treadmill wearing Lifecorder, ActiGraph, RT3, and Biotrainer. Oxygen uptake was measured and steps manually counted. Fat free mass (FFM) was assessed from bioelectrical impedance analysis. Accelerometer counts and the individual linear regression lines of accelerometer counts versus VO2/FFM were evaluated, together with steps recorded by Lifecorder and Actigraph.Results:Correlations between accelerometer counts and VO2/FFM for all monitors were r ≥ .95 (P < .01). The accelerometer counts and their relationship to VO2/FFM did not generally differ significantly by body weight status. Lifecorder and Actigraph underestimated steps at 4, 5, and 6 km/h by less than 9%, but the error was up to −95% at 2 km/h.Conclusions:All 4 accelerometers show high ability to assess physical activity intensity, and can be used to compare physical activity between normal-weight and overweight children. The Lifecorder and the ActiGraph showed high accuracy in assessing steps, providing speed of movement exceeded 2 km/h.

Baseline Correlates of Insulin Resistance in Inner City High-BMI African-American Children

Obesity ◽  
2008 ◽  
Vol 16 (9) ◽  
pp. 2039-2045 ◽  
Author(s):  
Aarthi Raman ◽  
Mark D. Fitch ◽  
Mark L. Hudes ◽  
Robert H. Lustig ◽  
Carolyn B. Murray ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
African American ◽  
Inner City ◽  
African American Children ◽  
American Children ◽  
High Bmi

Maximal aerobic capacity in African-American and Caucasian prepubertal children

1997 ◽  
Vol 273 (4) ◽  
pp. E809-E814 ◽  
Author(s):  
Christina A. Trowbridge ◽  
Barbara A. Gower ◽  
Tim R. Nagy ◽  
Gary R. Hunter ◽  
Margarita S. Treuth ◽  
...  
Keyword(s):  
African American ◽  
Energy Expenditure ◽  
African American Children ◽  
Maximal Aerobic Capacity ◽  
Lean Tissue ◽  
Tissue Mass ◽  
Prepubertal Children ◽  
Fasted State ◽  
Total Fat ◽  
American Children

The purpose of this study was to examine differences in resting, submaximal, and maximal (V˙o 2 max) oxygen consumption (V˙o 2) in African-American ( n = 44) and Caucasian ( n = 31) prepubertal children aged 5–10 yr. RestingV˙o 2 was measured via indirect calorimetry in the fasted state. SubmaximalV˙o 2 andV˙o 2 max were determined during an all out, progressive treadmill exercise test appropriate for children. Dual-energy X-ray absorptiometry was used to determine total fat mass (FM), soft lean tissue mass (LTM), and leg soft LTM. Doubly labeled water was used to determine total energy expenditure (TEE) and activity energy expenditure (AEE). A significant effect of ethnicity ( P < 0.01) was found for V˙o 2 max but not resting or submaximalV˙o 2, with African-American children having absoluteV˙o 2 max ∼15% lower than Caucasian children (1.21 ± 0.032 vs. 1.43 ± 0.031 l/min, respectively). The lowerV˙o 2 max persisted in African-American children after adjustment for soft LTM (1.23 ± 0.025 vs. 1.39 ± 0.031 l/min; P< 0.01), leg soft LTM (1.20 ± 0.031 vs. 1.43 ± 0.042 l/min; P < 0.01), and soft LTM and FM (1.23 ± 0.025 vs. 1.39 ± 0.031 l/min; P < 0.01). The lowerV˙o 2 max persisted also after adjustment for TEE (1.20 ± 0.02 vs. 1.38 ± 0.0028 l/min P < 0.001) and AEE (1.20 ± 0.024 vs. 1.38 ± 0.028 l/min; P < 0.001). In conclusion, our data indicate that African-American and Caucasian children have similar rates of V˙o 2 at rest and during submaximal exercise, butV˙o 2 max is ∼15% lower in African-American children, independent of soft LTM, FM, leg LTM, TEE, and AEE.

scholarly journals Sugar intake and cardio metabolic risk factors in high BMI African American children

2010 ◽  
Vol 24 (S1) ◽  
Author(s):  
Sushma Sharma ◽  
Lindsay S Roberts ◽  
Mark L Hudes ◽  
Robert H Lustig ◽  
Sharon E Fleming
Keyword(s):  
Risk Factors ◽  
African American ◽  
Metabolic Risk Factors ◽  
African American Children ◽  
Metabolic Risk ◽  
Sugar Intake ◽  
American Children ◽  
High Bmi

scholarly journals Taking Action Together: A YMCA-based protocol to prevent Type-2 Diabetes in high-BMI inner-city African American children

Trials ◽  
2010 ◽  
Vol 11 (1) ◽  
Author(s):  
Lorrene D Ritchie ◽  
Sushma Sharma ◽  
Joanne P Ikeda ◽  
Rita A Mitchell ◽  
Aarthi Raman ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
African American ◽  
Inner City ◽  
African American Children ◽  
American Children ◽  
Taking Action ◽  
High Bmi

EVALUATION OF METHODS TO ASSESS PHYSICAL ACTIVITY AND ENERGY EXPENDITURE IN AFRICAN-AMERICAN CHILDREN

1998 ◽  
Vol 30 (Supplement) ◽  
pp. 161
Author(s):  
F. A. Ram??rez-Marrero ◽  
B. A. Smith ◽  
T. E. Kirby ◽  
W. M. Sherman ◽  
M. I. Goran
Keyword(s):  
Physical Activity ◽  
African American ◽  
Energy Expenditure ◽  
African American Children ◽  
American Children ◽  
Evaluation Of Methods

scholarly journals Macronutrient intakes and cardio metabolic risk factors in high BMI African American children

2009 ◽  
Vol 6 (1) ◽  
pp. 41 ◽  
Author(s):  
Sushma Sharma ◽  
Lindsay S Roberts ◽  
Mark L Hudes ◽  
Robert H Lustig ◽  
Sharon E Fleming
Keyword(s):  
Risk Factors ◽  
African American ◽  
Metabolic Risk Factors ◽  
African American Children ◽  
Metabolic Risk ◽  
American Children ◽  
High Bmi
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