Actually, it can be deemed as both - judo, tkd and boxing are martial sports.
the term 'art' implies that there is more to it than just fighting - there's history, possibly religion, etc. judo is a sport form of a combat art. modern tkd, while an art, is generally different from old style tkd which resembled shotokan. There was a bitter rivalry bewteen the koreans and japanese, and the koreans did not want their art to resemble the japanese karate and would not admit that it descended form the japanese system. all of the flashy kicks were added, alot of the grappling and hand techs were removed, it was over time elected as a national (the national?) sport and eventually evolved the sport tkd that we have today. I know that not all tkd is taught in the sport format, but I am talking about the sport, as it pertains to this topic.
can you learn to fight with these sports? definitely. And in alot of cases, faster than in the traditional styles. With alot of the sports however, the classes may be more informal, and they may or may not get into the history, religion, etc. of the system.
i'm nobody...i'm nobody. i'm a tramp, a bum, a hobo... a boxcar and a jug of wine... but i'm a straight razor if you get to close to me.
-Charles Manson
I will punch, kick, choke, throw or joint manipulate any nationality equally without predjudice.
- Shonie Carter