OBJECTIVES: The purpose of the study was to establish activity intensity cut-points for the GENEA accelerometer via calibration with oxygen consumption (V˙O(2)). DESIGN: The study was a lab-based validation and calibration study. METHODS: Forty-four children, aged 8-14 years, completed eight activities (ranging from lying supine to a medium paced run) whilst wearing GENEA accelerometers at three locations (each wrist and at the right hip), an ActiGraph GT1M at the hip and a portable gas analyser. ActiGraph output and V˙O(2) were used for assessment of concurrent and criterion validity, respectively. Pearson's r correlations were used to assess validity of the GENEA monitors at each location and location-specific activity intensity cut-points were established via Receiver Operator Characteristic curve analysis. RESULTS: The GENEA showed good criterion validity at both wrist locations (right: r=.900; left: r=.910, both p<0.01), although the hip-mounted monitor demonstrated significantly higher criterion validity (r=.965, p<0.05). Similar results were shown for concurrent validity (right: r=.830; left: r=.845; hip: r=.985, all p<0.01). GENEAs, irrespective of wear location, accurately discriminated between all activity intensities (sedentary, light, moderate and vigorous) with the hip mounted monitor recording the largest area under the curve for each intensity (area under the curve=0.94-0.99). CONCLUSIONS: The GENEA can be used to accurately assess children's physical activity intensity when worn at either the wrist or the hip.
OBJECTIVES: The purpose of the study was to establish activity intensity cut-points for the GENEA accelerometer via calibration with oxygen consumption (V˙O(2)). DESIGN: The study was a lab-based validation and calibration study. METHODS: Forty-four children, aged 8-14 years, completed eight activities (ranging from lying supine to a medium paced run) whilst wearing GENEA accelerometers at three locations (each wrist and at the right hip), an ActiGraph GT1M at the hip and a portable gas analyser. ActiGraph output and V˙O(2) were used for assessment of concurrent and criterion validity, respectively. Pearson's r correlations were used to assess validity of the GENEA monitors at each location and location-specific activity intensity cut-points were established via Receiver Operator Characteristic curve analysis. RESULTS: The GENEA showed good criterion validity at both wrist locations (right: r=.900; left: r=.910, both p<0.01), although the hip-mounted monitor demonstrated significantly higher criterion validity (r=.965, p<0.05). Similar results were shown for concurrent validity (right: r=.830; left: r=.845; hip: r=.985, all p<0.01). GENEAs, irrespective of wear location, accurately discriminated between all activity intensities (sedentary, light, moderate and vigorous) with the hip mounted monitor recording the largest area under the curve for each intensity (area under the curve=0.94-0.99). CONCLUSIONS: The GENEA can be used to accurately assess children's physical activity intensity when worn at either the wrist or the hip.
Authors: Christine A Schaefer; Claudio R Nigg; James O Hill; Lois A Brink; Raymond C Browning Journal: Med Sci Sports Exerc Date: 2014-04 Impact factor: 5.411
Authors: Kelly Wilkinson; Dimitris Vlachopoulos; Panagiota Klentrou; Esther Ubago-Guisado; Augusto César Ferreira De Moraes; Alan R Barker; Craig A Williams; Luis A Moreno; Luis Gracia-Marco Journal: Eur J Appl Physiol Date: 2017-03-07 Impact factor: 3.078
Authors: Jacob Szeszulski; Sonia Vega-López; Michael Todd; Frank Ray; Alma Behar; Maria Campbell; Adrian Chavez; Ryan Eckert; Anabell Lorenzo-Quintero; Leopoldo Hartmann Manrique; Noe C Crespo Journal: Contemp Clin Trials Date: 2020-02-13 Impact factor: 2.226
Authors: Mary E Rosenberger; William L Haskell; Fahd Albinali; Selene Mota; Jason Nawyn; Stephen Intille Journal: Med Sci Sports Exerc Date: 2013-05 Impact factor: 5.411