From what I understand, you simply want to cross-check the obesity data per block in Connecticut with the concentration data of gyms expressed in points, and you want to construct buffers with the gym points, proportional to the obesity data for the block where found. I can easily cross these data, allowing inferences to be made about the relationship between these two variables. And I can present the results graphically in quite different ways. I send you everything and you choose what suits you best. I guarantee that I will give you a great job, even because this will be my first job on this platform.
The most important question is obtaining the data. I already have obesity data from the population of Connecticut (percentage of obese in 100 x 100 m cells). All I need is the data from the gyms in Connecticut. Do you have any sources?