You may have some reasons why you want to build your speed or your agility. You may be a marathon runner, you may be a track and field athlete or just love to show off to your friends just how fast and agile you are, right? Well, if you really think that you have what it takes to be very agile and fast, you need a lot more speed agility training and the best thing is, you can learn all the basics on your own if you have a copy of a book guide that comes with lots of DVDs to help you with your training and discipline. If you really want to train yourself effectively, this is what you need to have right now.