Association Between Physical Activity Diverisy And The Built Environment In Shenzhen City

Walking,jogging and cycling are the primary activities that the majority of people undertake for health,fitness and leisure,and are also main concerns in the field of urban planning.As the main carrier of physical activity,systematic,intensive,high degree of the urban public space is the precondition for the city system healthy,orderly and sustainable development.The core issues of concern in urban planning is how to provide fair use opportunities for all kinds of people,and meet all demands of different age groups,different health conditions and different social classes of people to do various activities.Studies of physical activity have been more concerned with the environmental characteristics associated with a single type of physical activity than with the diversity of physical activities in a space.However,few studies hav e taken all three activities into overall consideration,even though a focus on the diversity of physical activity would give a more comprehensive understanding of the impact of built environment.Therefore,this study takes the diversity as the main conce rn and explores influence factors that affect physical activity diversity.In this paper,we present physical activities as the research object and Shenzhen as a representative case,using physical activity VGI and GIS to describe the spatial distribution of the types,times and people diversity of physical activities in Shenzhen.Meanwhile,combined with the existing research results,the general factors and special factors of different diversity were came up,and three multiple linear regressions were used to explore the relationships between physical activity diversity and built environment.The study found that road density and bus stops density were positively correlated with the three diversity.The proportion of parks was positively correlated with the diversity of time and the diversity of people,but the population density and land use mixture had negative impact on the diversity og type.In addition,for the environmental factors of d ifferent diversity choices,greenway density,scenic spot density and sport interests density were positively correlated with the diversity of activity types.Shopping points density and public safety score also supported the diversity of activity time,but NDVI and commercial land proportion had negative impact on time.Public service facility density and the diversity of residential types were positively correlated with the diversity of people.Therefore,built environment with big parks,dense road network,good accessibility and its own attraction are the premise of public space to carry three diversity,spatial inclusion,integrated service capabilities and distribution location are the foundation of public space to carry more diversity physical activity.An analyzing framework was established for promoting comprehensive diversity,accessibility and big parks are the basic index,spatial inclusive activities,24-hour service capacity and urban safety level,and diverse types of occupations are exclusive indicators.In order to further verify the regression results,we choose typical park in Shenzhen to explore the influence of built environment and propose several suggestions for the planning and design to increase physical activity diversity.