 Although not a sport in itself, the term is used to describe a social exercise played in parks, fields, streets, back yards and also as a playground game that requires at least two people.Kick-to-kick is used as a warm-up exercise of many Australian rules football clubs and has been the beginnings of many clubs in far-flung places.It has long been a pitch invasion tradition in the breaks immediately after official Australian rules football matches, although as professionalism in the Australian Football League increased, the practice was discontinued at most of AFL venues.