An also-ran is a biathlete who combines running with one other activity. That other activity can be pretty much anything.
If you are an also-ran and your other activity (other than running, that is) is something like, say, tiddlywinks, other types of also-rans will laugh at you for calling yourself an also-ran. They might also threaten you with serious bodily harm for degrading their sport. You’ve been warned.