# Racial bias in health monitoring of wearable devices Wearable devices do have the problem of racial bias in health monitoring, which is mainly manifested in the following aspects： 1. **Pulse oximetry deviation**: Studies have shown that the blood oxygen saturation measurement of dark-skinned users is often not as accurate as that of light-skinned users. This is because the light reflection technology used by most optical sensors is less effective on dark skin. 2. **Unequal heart rate monitoring**: Some smart watches and fitness trackers have reduced accuracy when monitoring the heart rate of dark-skinned people, which may lead to deviations in health risk assessment. 3. **Underrepresentation of data**: The training data sets for the development of these devices usually lack sufficient ethnic diversity, resulting in algorithms that are not accurate enough in interpreting the health indicators of certain populations. 4. **Differences in accessibility**: Economic and social factors also lead to uneven access to wearable technology by different ethnic groups. Solving these problems requires a more inclusive design approach, a diverse test population, and sensing technology optimized for different skin tones.