How to SPRINT FASTER For 100 - 400m (THIS SYSTEM WORKS!)

Had a question about Charlie Francis' short to long endurance training ideas, so here's the concept and why it works. Enjoy! Please hit the like button if you liked the video, feel free to leave your comments below and subscribe. Thanks Music provided with thanks from Freeplay.com: Give it your All (Instrumental) by Adam Micheals Sanity waits for Nobody (Instrumental) Road to Hell (Instrumental):Elliot Pister 'Fair Use' exception applies on copyright material.