I may be an outlier here but I am always put aback by the idea the primary focus of a competitive skater should be to skate in an Olympics.
That is one of the concepts killing the popularity of figure skating. How long would golf and tennis survive if they only had one major or slam every four years? I understand Bob Costas' obsession since NBC pays so much for the Olympics but how they convinced USFSA and ISU to go along with that self-destructive myth is amazing. Anyone remember who won Olympic gold in tennis? Anyone care? Good!
Done ranting.
Back on topic -- Yu-Na should skate as long as she can and wants to without risking permanent injury. Saving herself for 2010 is no way to have a skating career. If she can't compete on a regular basis during the season then I would hope she would give up competitive skating altogether and get on with the rest of her life --- she has great star-power in Korea and could do wonders with their skating programs over there. She'll have no difficulty translating her star power into financial rewards if that is important to her.
Sure an athlete can avoid injuries by not competing or not playing the game. To plan an entire career around avoiding injury is absurd and really, it wouldn't work anyways. Without competing, no matter how clever her practices, no matter how great her talent, it just wont work. . . and for the health of figure skating in general and for the sake of the athletes who go out there and put their bodies and pride on the line 4 or 5 times a season I sincerely hope it doesn't work . . . and I am a long time fan of Yu-na and would like nothing better than for her to have a successful career -- which to me means far far more than 8 minutes in Vancouver.