Using a mat or comfortable flooring underneath the knees come into a kneeling position
Place the top 1/3rd of the foot underneath a cabinet as shown here or a heavy dumbbell
In an upright posture with the arms crossed over the chest tuck the pelvis ‘under’ so the gluteal muscles are active
Maintaining a straight line from the head to the tailbone, lower the trunk towards the ground to the point where you cannot maintain the position anymore
At this point, use the arms to catch yourself
Bend the knees so the buttocks is on the heels and return to the starting position