HBO's "Game of Thrones" s01e01 dialogue between Ned and Jaime at banquet?

I don't know if my hearing is going or if the line was just a little mumbly-mouthed but I can't make out what exactly Ned says to Jaime about why he doesn't fancy tournaments after Jaime suggests it might be his advancing years which make him reluctant to compete. It must be witty, judging by Jaime's reply so I am curious. All I can get after repeated tries is "I don't fancy tournaments because" and then mumblemubledymumbeh.... Can someone tell me what this line is?