Stand nice and tall facing a sturdy chair with your feet hip-width apart and your hands resting lightly on the top of the chair for balance.
Bend both knees slightly and pull your abdominals in, drawing your belly button towards the spine until your tailbone drops towards the floor and the low back lengthens.
Lift your right foot and bend the right knee. Bring your right heel up towards the right glute, flexing your foot.
Activate and contract the right gluteus maximus muscle — the muscle in the center of the right cheek — to move your right knee slightly behind the right hip while keeping your core engaged. Hold the right leg back and squeeze the glute muscles.
Move:
Keeping your core firmly engaged, start to press the right leg back and hold. The movement should be driven by contracting the gluteus maximus muscle.
Press back and hold and repeat 10 to 20 times. Try to avoid letting the right knee move so far forward that it passes the right hip.
Maintaining the same alignment, start to pick up the tempo, pressing back a little quicker. Repeat 10 to 20 times.