One of my pet peeves within the fitness industry is poor execution of drills in 90/90 position. For some reason, 90/90 has become the hottest thing since sliced bread but is almost always butchered. It might look cool, but you're honestly wasting your time if you don't understand how to properly position yourself.
By setting up correctly, you reap all of the benefits from 90/90 and can see dramatic improvements in mobility quickly. Below is a quick tutorial on how to effectively position your body in order to own 90/90 to the best of your ability.