Complex sentence: Vibration dampeners (otherwise known as "gummies") are not believed to be a reliable preventative measure, rather proper weight distribution in the racket is thought to be a more viable option in negating shock.
Split into simpler sentences: Vibration dampeners (otherwise known as "gummies") are not believed to be a reliable preventative measure. Rather proper weight distribution in the racket is thought to be a more viable option in negating shock.