Learn how to perform a kneeling quad stretch exercise with this video tutorial. Whether you're looking to warm up, wind down or just increase your flexibility, a good stretch routine can go a long way. However, with stretching, as with any exercise, a basic mastery of proper technique is essential for both maximizing effectiveness and avoiding accidental injury. Happily, with free exercise videos like this one, learning the proper technique is easy. For more information, including step-by-step instructions, and to get started using this stretch exercise yourself, take a look.