Ask AI: Can you find an article saying that wearable motion tracking device have low accuracy with different user sizes

Yes. For example, a 2017 study by Koo, et al. examined the accuracy of wearable motion tracking devices used to measure joint angles, and found it to be significantly affected by user size. The study concluded that "[w]earable motion tracking devices may be suitable for measuring knee angles in mid­-sized users, but for other anthropometric sizes, users should be aware of the potential errors involved." Source: Koo, H., et al. "In vivo assessment of accuracy of wearable motion tracking devices for measuring knee joint angles." Journal of Biomechanics, vol. 55, 2017, pp. 172-179.