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https://hdl.handle.net/1959.11/16211
Title: | Validity of accelerometry in ambulatory children and adolescents with cerebral palsy | Contributor(s): | Clanchy, Kelly (author); Tweedy, Sean M (author); Boyd, Roslyn N (author); Trost, Stewart G (author) | Publication Date: | 2011 | DOI: | 10.1007/s00421-011-1915-2 | Handle Link: | https://hdl.handle.net/1959.11/16211 | Abstract: | To evaluate the validity of the ActiGraph accelerometer for the measurement of physical activity intensity in children and adolescents with cerebral palsy (CP) using oxygen uptake (VO₂) as the criterion measure. Thirty children and adolescents with CP (mean age 12.6 ± 2.0 years) wore an ActiGraph 7164 and a Cosmed K4b² portable indirect calorimeter during four activities; quiet sitting, comfortable paced walking, brisk paced walking and fast paced walking. VO₂ was converted to METs and activity energy expenditure and classified as sedentary, light or moderate-to-vigorous intensity according to the conventions for children. Mean ActiGraph counts min⁻¹ were classified as sedentary, light or moderate-to-vigorous (MVPA) intensity using four different sets of cut-points. VO₂ and counts min⁻¹ increased significantly with increases in walking speed ('P' < 0.001). Receiver operating characteristic (ROC) curve analysis indicated that, of the four sets of cut-points evaluated, the Evenson et al. (J Sports Sci 26(14):1557–1565, 2008) cut-points had the highest classification accuracy for sedentary (92%) and MVPA (91%), as well as the second highest classification accuracy for light intensity physical activity (67%). A ROC curve analysis of data from our participants yielded a CP-specific cut-point for MVPA that was lower than the Evenson cut-point (2,012 vs. 2,296 counts min⁻¹), however, the difference in classification accuracy was not statistically significant 94% (95% CI = 88.2-97.7%) vs. 91% (95% CI = 83.5-96.5%). In conclusion, among children and adolescents with CP, the ActiGraph is able to differentiate between different intensities of walking. The use of the Evenson cut-points will permit the estimation of time spent in MVPA and allows comparisons to be made between activity measured in typically developing adolescents and adolescents with CP. | Publication Type: | Journal Article | Source of Publication: | European Journal of Applied Physiology, 111(12), p. 2951-2959 | Publisher: | Springer | Place of Publication: | Germany | ISSN: | 1439-6327 1439-6319 |
Fields of Research (FoR) 2008: | 110602 Exercise Physiology 110604 Sports Medicine |
Socio-Economic Objective (SEO) 2008: | 920199 Clinical Health (Organs, Diseases and Abnormal Conditions) not elsewhere classified | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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