Contract the buttock muscles of the leg on which you are going to stand.
Stand on the leg and lift the other knee forward.
Do not let your knee turn in on the weight bearing leg.
Control the knee by contracting the buttock muscles.
Keep your knee relaxed or unlocked (no hyperextension).
Keep your trunk still, do not tilt your pelvis, but keep it level (no drop).
Try to hold this position.
