▁California ▁but ▁developed ▁two ▁Ach illes ▁tend init is , ▁a ▁ru pt ured ▁shoulder ▁and ▁Sci atica . ▁In ▁ 1 9 9 8 , ▁she ▁moved ▁to ▁Har bin , ▁China ▁to ▁train ▁with ▁Chen ▁Lu ' s ▁former ▁coach , ▁Hong y un ▁Li u , ▁but ▁although ▁her ▁jump ing ▁improved , ▁the ▁Chinese ▁feder ation ▁object ed ▁to ▁a ▁non - n ational ▁being ▁trained ▁by ▁him . ▁In ▁December , ▁she ▁moved ▁to ▁Switzerland , ▁where ▁she ▁met ▁coach ▁Oliver ▁Hö ner ; ▁it ▁was ▁the ▁first ▁time ▁she ▁had ▁res ided ▁in ▁her ▁birth ▁country . ▁ ▁In ▁the ▁summer ▁of ▁ 1 9 9 9 , ▁she ▁went ▁to ▁the ▁U . S . ▁and ▁was ▁briefly ▁co ached ▁by ▁Gal ina ▁Z m iev sk aya ▁but ▁t ore ▁kne e ▁lig aments ▁and ▁returned ▁to ▁Switzerland ▁for ▁treatment . ▁Her ▁last ▁IS U ▁event ▁was ▁the ▁ 1 9 9 9 ▁Cup ▁of ▁Russia . ▁She ▁sust ained ▁an ▁injury ▁after ▁falling ▁on ▁a ▁jump ▁during ▁practice ▁the ▁day ▁before ▁the ▁competition ▁but ▁took ▁three ▁Cort is one ▁in jections ▁a ▁day ▁and ▁finished ▁ 6 th ▁at ▁the ▁event . ▁She ▁later ▁learned ▁she ▁had ▁f ract ured ▁her ▁sp ine , ▁resulting ▁in ▁two ▁dis located ▁disc s . ▁Her ▁spin ning ▁may ▁also ▁have ▁resulted ▁in ▁subt le ▁conc uss ions . ▁A ▁study ▁is ▁under way ▁to ▁determine ▁whether ▁int ensive ▁training ▁of ▁sp ins ▁may ▁cause ▁conc uss