Fine, all cops are fat and the majority of cops that die in a chase on foot are killed by heart attacks because they are so out of shape. Feel better now?
https://www.copsalive.com/heart-disease-and-the-law-enforcement-officer/
Heart attacks are always in the top two or three categories of police line of duty deaths. However, if extrapolated to a full 24-hour day, heart attack likely becomes the number one killer of men and women in uniform.