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Article: Calibration of the RT3 accelerometer for ambulation and nonambulation in children

TitleCalibration of the RT3 accelerometer for ambulation and nonambulation in children
Authors
KeywordsChinese
Physical activity
Riaxial accelerometer
Sedentary
Issue Date2007
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.acsm-msse.org
Citation
Medicine And Science In Sports And Exercise, 2007, v. 39 n. 11, p. 2085-2091 How to Cite?
AbstractPURPOSE: The purpose of this study was to provide RT3 accelerometer thresholds to distinguish nonambulation from ambulation, as well as distinguish between low, moderate, and vigorous intensity ambulation in Chinese children. METHODS: Thirty-five 8- to 12-yr-olds completed a laboratory-based experiment to calibrate the RT3 device across a range of intensities. Oxygen uptake during sedentary tasks and ambulation was aligned, with corresponding RT3 output, to one of four intensity categories (sedentary, < 2 METs; low, ≥ 2 but < 3 METs; moderate, ≥ 3 but < 6; and vigorous, ≥ 6). Threshold values were derived using receiver operator curves to distinguish the sedentary from low intensity, low from moderate intensity, and moderate from vigorous intensity. These were confirmed in an independent sample of 46 similarly aged children. RESULTS: RT3 movement counts increased in a linear manner with scaled oxygen uptake from stationary to vigorous movement (r = 0.83). The ROC-derived thresholds showed a good ability to discriminate between nonambulatory and ambulatory tasks, as well as distinguish between low, moderate, and vigorous ambulation (sensitivity values of 87-100% and specificity values of 97-100%). ROC analyses in the independent sample showed sensitivity and specificity values ranging from 72 to 98%, indicating that the thresholds provided an accurate distinction between the four intensity categories. A Cohen's kappa of κ = 0.92 confirmed that the lower threshold had near-perfect agreement with the independent sample, whereas the moderate-intensity and vigorous-intensity thresholds showed good agreement with the independent sample (κ = 0.63 and 0.65, respectively). CONCLUSION: The RT3 accelerometer provides an acceptable marker of both sedentary and ambulatory behavior in Chinese children. ©2007The American College of Sports Medicine.
Persistent Identifierhttp://hdl.handle.net/10722/87934
ISSN
2015 Impact Factor: 4.041
2015 SCImago Journal Rankings: 2.007
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChu, EYWen_HK
dc.contributor.authorMcManus, AMen_HK
dc.contributor.authorYu, CCWen_HK
dc.date.accessioned2010-09-06T09:36:19Z-
dc.date.available2010-09-06T09:36:19Z-
dc.date.issued2007en_HK
dc.identifier.citationMedicine And Science In Sports And Exercise, 2007, v. 39 n. 11, p. 2085-2091en_HK
dc.identifier.issn0195-9131en_HK
dc.identifier.urihttp://hdl.handle.net/10722/87934-
dc.description.abstractPURPOSE: The purpose of this study was to provide RT3 accelerometer thresholds to distinguish nonambulation from ambulation, as well as distinguish between low, moderate, and vigorous intensity ambulation in Chinese children. METHODS: Thirty-five 8- to 12-yr-olds completed a laboratory-based experiment to calibrate the RT3 device across a range of intensities. Oxygen uptake during sedentary tasks and ambulation was aligned, with corresponding RT3 output, to one of four intensity categories (sedentary, < 2 METs; low, ≥ 2 but < 3 METs; moderate, ≥ 3 but < 6; and vigorous, ≥ 6). Threshold values were derived using receiver operator curves to distinguish the sedentary from low intensity, low from moderate intensity, and moderate from vigorous intensity. These were confirmed in an independent sample of 46 similarly aged children. RESULTS: RT3 movement counts increased in a linear manner with scaled oxygen uptake from stationary to vigorous movement (r = 0.83). The ROC-derived thresholds showed a good ability to discriminate between nonambulatory and ambulatory tasks, as well as distinguish between low, moderate, and vigorous ambulation (sensitivity values of 87-100% and specificity values of 97-100%). ROC analyses in the independent sample showed sensitivity and specificity values ranging from 72 to 98%, indicating that the thresholds provided an accurate distinction between the four intensity categories. A Cohen's kappa of κ = 0.92 confirmed that the lower threshold had near-perfect agreement with the independent sample, whereas the moderate-intensity and vigorous-intensity thresholds showed good agreement with the independent sample (κ = 0.63 and 0.65, respectively). CONCLUSION: The RT3 accelerometer provides an acceptable marker of both sedentary and ambulatory behavior in Chinese children. ©2007The American College of Sports Medicine.en_HK
dc.languageengen_HK
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.acsm-msse.orgen_HK
dc.relation.ispartofMedicine and Science in Sports and Exerciseen_HK
dc.rightsMedicine And Science In Sports And Exercise. Copyright © Lippincott Williams & Wilkins.en_HK
dc.subjectChineseen_HK
dc.subjectPhysical activityen_HK
dc.subjectRiaxial accelerometeren_HK
dc.subjectSedentaryen_HK
dc.titleCalibration of the RT3 accelerometer for ambulation and nonambulation in childrenen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0195-9131&volume=39&spage=2085&epage=2091&date=2007&atitle=Calibration+Of+The+Rt3+Accelerometer+For+Ambulation+And+Nonambulation+In+Childrenen_HK
dc.identifier.emailMcManus, AM: alimac@hku.hken_HK
dc.identifier.emailYu, CCW: yucw@hkucc.hku.hken_HK
dc.identifier.authorityMcManus, AM=rp00936en_HK
dc.identifier.authorityYu, CCW=rp00982en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1249/mss.0b013e318148436cen_HK
dc.identifier.pmid17986919en_HK
dc.identifier.scopuseid_2-s2.0-35948996575en_HK
dc.identifier.hkuros140435en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35948996575&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume39en_HK
dc.identifier.issue11en_HK
dc.identifier.spage2085en_HK
dc.identifier.epage2091en_HK
dc.identifier.eissn1530-0315-
dc.identifier.isiWOS:000250903100026-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChu, EYW=26666500500en_HK
dc.identifier.scopusauthoridMcManus, AM=7004635919en_HK
dc.identifier.scopusauthoridYu, CCW=35235958400en_HK

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