The largest distinction in choosing activity tracker devices is in their purpose: is it being used for recreation or research? Indoor or outdoor conditions? Research employing HR assessment during activity is more likely to use a chest strap that transmits data to a specialized watch ( 10, 14, 26, 30). Popularity of these devices have risen exponentially in the past decade with advances in technology and health initiatives that promote physical activity ( 13, 18, 20). The accuracy of the Mio Alpha was likely affected by wrist movements during the HIT training.Īctivity trackers are an evolving technology that allows the consumer to collect and monitor physical activity data such as steps, caloric expenditure, sleep, and heart rate (HR) ( 8). Placing a HR monitor in an earbud is a viable option for obtaining an accurate HR assessment during different types of exercise. The Jabra earbud had a MAPE of 3.14 ± 6.13%, and a high correlation with the benchmark, r(c) = 0.939, performing well in all three conditions.
Overall, the Mio Alpha had a MAPE of 5.73 ± 10.19% and a moderate correlation with the benchmark, r(c) = 0.771, performing better in the treadmill and outdoor conditions. Analyses included mean bias, mean absolute percent error (MAPE), and Lin’s concordance coefficient. Three heart rate (HR) monitors, (Polar chest strap, Mio Alpha, Jabra earbud) were worn during all exercises, with the Polar chest strap serving as the benchmark. Participants completed 30 minutes of treadmill activity, 25 minutes of high-intensity interval exercise (HIT), and 40 minutes of continuous outdoor activity of their choice, walking or running. Twenty-two recreationally active participants (25.4 ± 6.9 years, 171 ± 11 cm, 73.9 ± 3.1 kg, and 25.2 ± 9.2% body fat) completed this study. The purpose of this study was to determine the accuracy of two optical heart rate monitors, the Jabra earbud and the Mio Alpha wristwatch, during aerobic and anaerobic exercise. Assessment of biometrics during exercise is evolving to create devices that are “all-inclusive”, in an effort to decrease the number of devices required during exercise while providing comprehensive and accurate biometric measures.
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