Coach John Walker puts his athletes through an insane circuit workout using the Sanddunestepper, which is an amazing tool for proprioception and speed development.  In the above video, Coach John is working with 10 & 11 year old football players from the Irvine Chargers to show them how to properly train to develop better overall team speed.  Send us an email at contact@playmakerlife.com if you are interested in grabbing one of these awesome training tools! 🏃🏽💨