We like to incorporate stretches to muscle groups that can be tight from prolonged sitting and simply playing the game of hockey. We will stretch within our strength training sessions to ensure that stretching doesn’t become an afterthought and to utilize the rest periods in between sets of strength training exercises.
A muscle group that can become tight and restricted is the Quadriceps (more specifically the Rectus Femoris, Vastus Intermedius, Vastus Medialis (VMO), and the Vastus Lateralis).
Years ago, I read this article by Charles Poliquin Question of Strength 22. I’ve been using this variation ever since. I’ve found more benefit with the addition of foam rolling the quads prior to this stretch.