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Accelerometer response to physical activity intensity in normal-weight versus overweight african american children.

Arvidsson, Daniel LU ; Fitch, Mark; Hudes, Mark L; Tudor-Locke, Catrine and Fleming, Sharon E (2011) In Journal of Physical Activity & Health 8(5). p.682-692
Abstract
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... (More)
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 (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Activity & Health
volume
8
issue
5
pages
682 - 692
publisher
Human Kinetics, Inc.
external identifiers
  • PMID:21734314
  • Scopus:79959564753
ISSN
1543-5474
language
English
LU publication?
yes
id
27bc4c86-a17a-422f-be73-06e8b4047776 (old id 2058905)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/21734314?dopt=Abstract
date added to LUP
2011-08-01 19:26:00
date last changed
2016-10-13 04:33:11
@misc{27bc4c86-a17a-422f-be73-06e8b4047776,
  abstract     = {BACKGROUND:<br/><br>
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.<br/><br>
<br/><br>
METHODS:<br/><br>
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.<br/><br>
<br/><br>
RESULTS:<br/><br>
Correlations between accelerometer counts and VO2/FFM for all monitors were r ≥ .95 (P &lt; .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.<br/><br>
<br/><br>
CONCLUSIONS:<br/><br>
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},
  author       = {Arvidsson, Daniel and Fitch, Mark and Hudes, Mark L and Tudor-Locke, Catrine and Fleming, Sharon E},
  issn         = {1543-5474},
  language     = {eng},
  number       = {5},
  pages        = {682--692},
  publisher    = {ARRAY(0xbdaf9f0)},
  series       = {Journal of Physical Activity & Health},
  title        = {Accelerometer response to physical activity intensity in normal-weight versus overweight african american children.},
  volume       = {8},
  year         = {2011},
}