TY - JOUR
T1 - Validity of wearable activity monitors for tracking steps and estimating energy expenditure during a graded maximal treadmill test
AU - Kendall, Bradley
AU - Bellovary, Bryanne
AU - Gothe, Neha P.
N1 - Publisher Copyright:
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2019/1/2
Y1 - 2019/1/2
N2 - The purpose of this study was to assess the accuracy of energy expenditure (EE) estimation and step tracking abilities of six activity monitors (AMs) in relation to indirect calorimetry and hand counted steps and assess the accuracy of the AMs between high and low fit individuals in order to assess the impact of exercise intensity. Fifty participants wore the Basis watch, Fitbit Flex, Polar FT7, Jawbone, Omron pedometer, and Actigraph during a maximal graded treadmill test. Correlations, intra-class correlations, and t-tests determined accuracy and agreement between AMs and criterions. The results indicate that the Omron, Fitbit, and Actigraph were accurate for measuring steps while the Basis and Jawbone significantly underestimated steps. All AMs were significantly correlated with indirect calorimetry, however, no devices showed agreement (p < .05). When comparing low and high fit groups, correlations between AMs and indirect calorimetry improved for the low fit group, suggesting AMs may be better at measuring EE at lower intensity exercise.
AB - The purpose of this study was to assess the accuracy of energy expenditure (EE) estimation and step tracking abilities of six activity monitors (AMs) in relation to indirect calorimetry and hand counted steps and assess the accuracy of the AMs between high and low fit individuals in order to assess the impact of exercise intensity. Fifty participants wore the Basis watch, Fitbit Flex, Polar FT7, Jawbone, Omron pedometer, and Actigraph during a maximal graded treadmill test. Correlations, intra-class correlations, and t-tests determined accuracy and agreement between AMs and criterions. The results indicate that the Omron, Fitbit, and Actigraph were accurate for measuring steps while the Basis and Jawbone significantly underestimated steps. All AMs were significantly correlated with indirect calorimetry, however, no devices showed agreement (p < .05). When comparing low and high fit groups, correlations between AMs and indirect calorimetry improved for the low fit group, suggesting AMs may be better at measuring EE at lower intensity exercise.
KW - Fitness trackers
KW - estimated energy expenditure
KW - high intensity
KW - maximal exercise
KW - step tracking
UR - http://www.scopus.com/inward/record.url?scp=85048004944&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048004944&partnerID=8YFLogxK
U2 - 10.1080/02640414.2018.1481723
DO - 10.1080/02640414.2018.1481723
M3 - Article
C2 - 29863968
AN - SCOPUS:85048004944
SN - 0264-0414
VL - 37
SP - 42
EP - 49
JO - Journal of Sports Sciences
JF - Journal of Sports Sciences
IS - 1
ER -