Complex sentence: In the midst of her public appearances, Vonn says training takes up most of her life except for a few weeks after the ski season, Vonn trains 6--8 hours a day for 6 days a week during the summer.
Split into simpler sentences: In the midst of her public appearances, Vonn says training takes up most of her life. Except for a few weeks after the ski season, Vonn trains 6--8 hours a day for 6 days a week during the summer.