Wearable technology has become increasingly popular in recent years, with many Americans relying on devices like Apple Watches to track their fitness goals. However, a new study from the University of Mississippi has found that these devices may not be as accurate as users think.
Professor Minsoo Kang and doctoral student Ju-Pil Choe reviewed 56 studies comparing the Apple Watch to other trusted tools for measuring energy burned, heart rate, and step counts. The researchers found that while Apple Watches are generally accurate when measuring heart rate and step counts, they are less reliable when it comes to measuring energy expenditure.
The study, published in the journal Physiological Measurement, showed that the mean absolute percent errors for heart rate and step counts were 4.43% and 8.17%, respectively, while the error for energy expenditure was as high as 27.96%. This inaccuracy was observed across all types of users and activities tested, including walking, running, cycling, and mixed-intensity workouts.
Kang and Choe emphasize that while Apple Watches can be useful tools for tracking basic activity and staying motivated, users should not rely on the data as completely accurate. They caution against using the devices to make decisions about workouts or medical conditions, as the numbers may be off and lead to confusion or overtraining.
The researchers also noted that newer models of Apple Watches appear to be more accurate, indicating that the technology is improving over time. Kang hopes that this study will help consumers make informed decisions about using wearable devices and encourage manufacturers to continue refining the technology.
By identifying the weaknesses in current wearable technology, Kang and Choe believe that developers can receive valuable feedback to design better sensors and algorithms. This, in turn, can make wearable devices more useful for both everyday users and healthcare providers.
Overall, while Apple Watches and similar devices can be helpful for tracking fitness goals and staying motivated, it is essential for users to understand their limitations and use the data as a guide rather than a definitive measure of their health and fitness. As technology continues to advance, wearable devices may become more accurate and reliable tools for monitoring health metrics.
