In order to develop athletes who can move optimally in multiple planes of motion, training should include elements that can challenge them in multiple planes while providing various resistance and proprioceptive challenges.
In this video from the NSCA's 2014 Coaches Conference, Adam Feit talks about the state of today's youth, and discusses the importance of training youth to reach their highest potential, both on and off the field.
This session from the 2015 TSAC Annual Training brings to light areas of coaching influence, while also explaining how to improve your coaching “power.”