Reexamination of Accelerometer Calibration with Energy Expenditure as Criterion: VO2net Instead of MET for Age-Equivalent Physical Activity Intensity
| Autor: | Mats Börjesson, Elin Ekblom-Bak, Jonatan Fridolfsson, Örjan Ekblom, Lauren Lissner, Christoph Buck, Daniel Arvidsson, Monica Hunsberger |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
medicine.medical_specialty
Equivalent speed Adults Adolescents VO2 Children Accelerometer Physical activity Speed VO2net Calibration Free-living MET Calibration (statistics) physical activity 030204 cardiovascular system & hematology lcsh:Chemical technology Biochemistry Metabolic equivalent Analytical Chemistry equivalent speed 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation children medicine adults lcsh:TP1-1185 Accelerometer data adolescents Electrical and Electronic Engineering Treadmill Instrumentation Sport and Fitness Sciences free-living Idrottsvetenskap business.industry speed 030229 sport sciences calibration Atomic and Molecular Physics and Optics Intensity (physics) accelerometer Energy expenditure business |
| Zdroj: | Sensors, Vol 19, Iss 15, p 3377 (2019) Sensors, 19(15):3377 Sensors Volume 19 Issue 15 |
| ISSN: | 1424-8220 |
| Popis: | Accelerometer calibration for physical activity (PA) intensity is commonly performed using Metabolic Equivalent of Task (MET) as criterion. However, MET is not an age-equivalent measure of PA intensity, which limits the use of MET-calibrated accelerometers for age-related PA investigations. We investigated calibration using VO2net (VO2gross &minus VO2stand mL&sdot min&minus 1&sdot kg&minus 1) as criterion compared to MET (VO2gross/VO2rest) and the effect on assessment of free-living PA in children, adolescents and adults. Oxygen consumption and hip/thigh accelerometer data were collected during rest, stand and treadmill walk and run. Equivalent speed (Speedeq) was used as indicator of the absolute speed (Speedabs) performed with the same effort in individuals of different body size/age. The results showed that VO2net was higher in younger age-groups for Speedabs, but was similar in the three age-groups for Speedeq. MET was lower in younger age-groups for both Speedabs and Speedeq. The same VO2net-values respective MET-values were applied to all age-groups to develop accelerometer PA intensity cut-points. Free-living moderate-and-vigorous PA was 216, 115, 74 and 71 min/d in children, adolescents, younger and older adults with VO2net-calibration, but 140, 83, 74 and 41 min/d with MET-calibration, respectively. In conclusion, VO2net calibration of accelerometers may provide age-equivalent measures of PA intensity/effort for more accurate age-related investigations of PA in epidemiological research. |
| Databáze: | OpenAIRE |
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