![]() ![]() ![]() In a recent review of 10 articles, Bunn et al noted tendencies of wearables to underestimate energy expenditure, heart rate, and step count. Despite their popularity, research is equivocal about whether commercial wearable devices are valid and reliable methods for estimating metrics associated with physical activity including steps, heart rate, and energy expenditure. It has been estimated that in the year 2019, 225 million consumer wearables were sold, and studies have suggested that more than a third of adults in Canada and Australia own and use a consumer wearable device. These consumer wearable devices are becoming increasingly popular for purchase and use. Research examining consumer wearable devices, such as watches, pendants, armbands, and other accessories, is associated with various labels including Quantified Self and mobile health (mHealth). However, research has shown variation in step count among devices, and the applicability of these metrics may vary by device brand and device type. Metrics defining physical activity guidelines from commercial wearable devices have been developed, including 10,000 steps per day and 100 steps per minute for moderate to vigorous activity. ![]() Though the successful promotion of physical activity is a complex multifacetted issue, behavior change is a well-established method to increase physical activity. Government organizations have attempted to improve these numbers by implementing initiatives aimed at promoting physical activity. A recent report suggested that about 23% of adults and 81% of school-going adolescents are not meeting physical activity guidelines. Globally, physical inactivity is a pressing public health concern. ![]()
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