Complex sentence: He has regularly won on the steepest, most technical track on the World Cup Circuit, Schladming, his famous run in Champery is also testament to his remarkably high skill level on technical courses.
Split into simpler sentences: He has regularly won on the steepest, most technical track on the World Cup Circuit, Schladming. His famous run in Champery is also testament to his remarkably high skill level on technical courses.