Running is a crude term. Plus for me its usually an accumilation of things.
But id say a fighter "ran" if he:

(counting down)

5- Constantly leads then backs off
4- Constantly counters and backs off
3- Constantly breaks off from exchanges 1st
2- Does't give any lateral movement untill he touches the ropes
1- Is clearly throwing less punches than usual

A fighter would probably need to do 3 or 4 of those things before i would call it "running".