[A review and update of the potential impact of the built environment on physical activity and dietary habits].

With the accelerated urbanization process, there are growing interests in the potential impact of neighborhood built-environment on residents' physical activity and dietary habits. In this paper, we introduced the concept of the built environment and the ways to assess the built-environment related to physical activity and dietary habits. We reviewed papers on the association of the built-environment with physical activity and dietary habits. Improvement of the built-environment is expected to reduce the health burden caused by insufficient physical activity and unhealthy dietary habits. As this field is still at its initial stage, there are many questions to be explored. We then discussed the challenges for this field and made some suggestions for future study.