The most popular sport in the country is running
Cross Country running. Or track and field.
Lacrosse has the most running in a single game alone. It is harder and in my opinion better. There is a lot of running, blocking, checking, etc.
Any sport that required running. However soccer players get the most attention
athletics (running & long jump)
Gymnastics Or the annual "Running of the Bulls" at Pamplona.
honestly,as asports science student,yes because most physical sports involve running
running EDIT: There was no main sport thay just played all the sports that existed.