Complex sentence: Yanina Batyrshina is arguably one of the most popular rhythmic gymnast of her decade, her winning style has altered the direction of rhythmic gymnastics in Russia as well as the rest of the world.
Split into simpler sentences: Yanina Batyrshina is arguably one of the most popular rhythmic gymnast of her decade. Her winning style has altered the direction of rhythmic gymnastics in Russia as well as the rest of the world.