Rotational Step Up

Here's another step up variation. If you start in a short staggered stance, focus on internal rotation through the outside hip as you touch the back knee to the ground. On your way up, push through that same outside foot to turn your pelvis away 90 degrees up onto the box. If you keep your foot on the ground, you will feel the glute and hamstrings extend and externally rotate the hip, while getting length through the hip flexor and groin.
This is great for any sprinting or striding athletes such as hockey, soccer, basketball players, as well as sports that require length in lunging like volleyball, tennis, badminton, and other racket sports.