Kinstretch Exercises and Stretches.  Learn how PAILS, RAILS, CARS, Hinges and Hovers work.  In this article, we break down the Kinstretch methodology behind Kinstretch stretches and exercises. How do the stretches work, why is an active range hold different from passive lift off, etc Master the Kinstretch class with this comprehensive look into the Kinstretch stretch and strengthen system,