http://myosource.com/ PLEASE VISIT OUR WEB SITE Hop over drills are great for jump training. Working on foot speed, quickness, core strength, kicking power and endurance. You can work all your Core muscles while doing your normal workout routine. quads, hams, glutes, hip flexor, speed, power, explosion and endurance. Quick feet Stamina flexibility balance Coach McQueen quick feet Distributed by Tubemogul.