This Exercise App Tracks Trends on How We Move In Different Cities – CityLab. City Planners, Architects, Transportation designers/engineers; here is a realistic challenge for us all. Create environments which encourage physical activity for people of all ages and abilities and we will have public health in good stead. People who move by walking, running, cycling within a city are healthier. Is design of all types causing us to be less healthy? OPC Inc Keeping the Human Factor as a priority for 24 years.