The Tornado Pass is a great kiteboarding exercise to get more power in your handle passes or even to learn a handle pass. It also gives you great core strength and the technique of the handle pass
Remember to keep the bar as close to your hips as possible. When you turn at the same time, it will get harder and force you to pass faster.
KiteboardingExercises.com - or just KBX - a site dedicated to make you a better kitesurfer. And it's not just for pros. Beginner, freeride, newschool, oldschool, wakestyle, waveriding, course race, snow and land kiteboarders will all be better with the right training. This site will teach you how to become a stronger and more powerful kitesurfer at your level. This is the site, you can't live without if you want to progress.
Kiteboarding exercises is all about core strength and kiteboard specific functional training.
Check out more exercises at http://www.kiteboardingexercises.com