The ideal kinetic chain for tennis for a human body is rotational, not linear as commonly taught. Simple changes of motion and direction transform into force. Bruce Lee found that out for Martial Arts. Oscar Wegner did that for tennis.
Mostly overseas coaches and Richard Williams in the USA applied Oscar’s teachings, and history has proven Oscar right. Many of those students are the top players of today.
Go to: tennisiseasy.com
Free new book and free videos.