File(s) under permanent embargo
Reliability and validity of a GPS-enabled iPhone "app" to measure physical activity
journal contribution
posted on 2015-01-01, 00:00 authored by A C Benson, Lyndell BruceLyndell Bruce, B A GordonThis study assessed the validity and reliability of an iPhone "app" and two sport-specific global positioning system (GPS) units to monitor distance, intensity and contextual physical activity. Forty (23 female, 17 male) 18-55-year-olds completed two trials of six laps around a 400-m athletics track wearing GPSports Pro and WiSpi units (5 and 1 Hz) and an iPhone(TM) with a Motion X GPS(TM) "app" that used the inbuilt iPhone location services application programming interface to obtain its sampling rate (which is likely to be ≤1 Hz). Overall, the statistical agreement, assessed using t-tests and Bland-Altman plots, indicated an underestimation of the known track distance (2.400 km) and average speed by the Motion X GPS "app" and GPSports Pro while the GPSports WiSpi(TM) device overestimated these outcomes. There was a ≤3% variation between trials for distance and average speed when measured by any of the GPS devices. Thus, the smartphone "app" trialled could be considered as an accessible alternative to provide high-quality contextualised data to enable ubiquitous monitoring and modification of programmes to ensure appropriate intensity and type of physical activity is prescribed and more importantly adhered to.
History
Journal
Journal of sports sciencesVolume
33Issue
14Pagination
1421 - 1428Publisher
Taylor & FrancisLocation
London, Eng.Publisher DOI
eISSN
1466-447XLanguage
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2014, Taylor & FrancisUsage metrics
Categories
No categories selectedKeywords
aerobic exerciseglobal positioning systemphysical activityreliability and validitysmartphoneAdolescentAdultCell PhoneExerciseFemaleGeographic Information SystemsHumansMaleMiddle AgedMobile ApplicationsMotor ActivityReproducibility of ResultsYoung AdultScience & TechnologyLife Sciences & BiomedicineSport SciencesAMERICAN-COLLEGESPORTS-MEDICINEPUBLIC-HEALTHADULTSRECOMMENDATIONACCURACYDISEASETIMEGIS
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC