One foot on the box and the other leg up against the shoulder rest, facing the side of the room. Drop down into a lunge, keeping weight over the supporting leg, then rise up to stand.
1B.
Down or up.
Floor Box.
Inhale to lower, exhale to rise.
Develop strength of the core, obliques, gluteals, quadriceps, and hamstrings.
Option to add dumbbells.
Progression: Adding weights or fewer springs.
Regression: More springs – kneeling splits.