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Assessing the Accuracy of Fitness Smartwatch Data for Cardiovascular and Physical Activity Monitoring: A Validation Study in Digital Health
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Validation study of Polar V800 accelerometer.

Adrián Hernández-Vicente1, Alejandro Santos-Lozano2, Katrien De Cocker3

  • 1Faculty of Health and Sport Science, University of Zaragoza, Huesca, Spain ;

Annals of Translational Medicine
|August 30, 2016
PubMed
Summary
This summary is machine-generated.

The Polar V800 offers comparable validity to the ActiTrainer for measuring physical activity and energy expenditure in young adults. Both devices showed similar results for sedentary time and walking duration in daily life.

Keywords:
Accelerometryenergy expenditure (EE)physical activity (PA)validityyoung adults

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Area of Science:

  • Sports Science
  • Biomedical Engineering
  • Human Movement Science

Background:

  • Accurate quantification of physical activity (PA) and energy expenditure (EE) is crucial for health research and practice.
  • Wearable technology offers a promising avenue for objective PA and EE monitoring in free-living conditions.

Purpose of the Study:

  • To assess the validity of the Polar V800 for quantifying PA and estimating EE.
  • To compare the Polar V800's performance against the ActiGraph (ActiTrainer) in healthy young adults.

Main Methods:

  • Eighteen young adults (19-23 years) wore both Polar V800 (wrist) and ActiTrainer (hip) for 7 days.
  • Statistical analyses included paired t-tests, Pearson correlations, and Bland-Altman analysis for agreement.
  • Sensitivity, specificity, and ROC-AUC were calculated to evaluate step count accuracy.

Main Results:

  • Significant differences were found between devices for most outcomes (P<0.05).
  • No significant differences were observed for sedentary bouts and walking/lifestyle time (P>0.05).
  • Fair accuracy (ROC-AUC=0.781) was found for classifying individuals meeting 10,000 daily steps.

Conclusions:

  • The Polar V800 demonstrates comparable validity to the ActiTrainer for specific metrics in free-living settings.
  • The devices showed similar performance in identifying 1-hour sedentary bouts and distinguishing walking/lifestyle time.
  • Further research may explore the Polar V800's utility in diverse populations and activity types.