Walking is an inevitable activity in daily life. Walking is also a moderate-intensity physical activity with much epidemiological evidence for promoting health. However, when people walk, they may fall or bump into things. In addition, walking in unfamiliar and complex environments is also dangerous for people. In these cases, smart technologies can come into play. This chapter first emphasizes the importance of healthy walking and mentions some of the difficulties that people face in walking safely and healthily. Then the application of smart technologies for healthy walking is introduced. The most commonly used smart technologies for smart and healthy walking include smart pedometers, smart canes, location awareness services (LAS) (smartphone applications), smart backpacks, etc. As cities transform into smart cities, sensors play an important role. Therefore, in smart cities, sensors can be widely used to collect movement, health, safety and other information to ensure that people walk healthily and safely. To this end, this chapter reviews some smart technology applications, including those based on location-aware services (LASs), sensors (e.g., wearable medical sensors), smart materials, smart canes, and smartphones. However, ordinary people may be reluctant to use these smart technology applications. These smart technology applications seem to be more suitable for people with disabilities and limited mobility. From this perspective, existing smart technology applications are reviewed to support disabled people and people with reduced mobility to walk healthily and safely in smart cities. According to the review results, the smart technologies most widely used to support people with disabilities and reduced mobility include the Internet of things (IoT), smart systems and machine learning (ML).
