Since 1991, we have sold the most effective and most popular jump training program on the market, Air Alert: The Complete Vertical Jump Program. During that time there have been 3 versions and the programs have helped over 500,000 athletes world wide. This year we improved the program one final time to bring you a training program in DVD that needs no further updating. Its predecessors, Air Alert I (1991), Air Alert II (1992) and Air Alert III (2000) provided athletes with fantastic results. This final version provides you with better results. It will help you to jump at least 8 inches higher over a 15 week period. But that is not all. Air Alert has a built in 6 week, second phase called Air Alert Advanced that can further your jumping ability by an additional 3 to 6 inches. But not only will you jump higher with this amazing program, you will also tremendously improve your running speed and endurance turning you into an all-around, better athlete. That's our guarantee!