engage leg muscles, do not hang by gripping with the hands
lengthen the spine
keep the lower back flat
balance between the tailbone and sit bones
grip the big toes with the thumb, index, and middle fingers
extend the arms
Urdhva Padangusthasana. It is important in this pose not to lean back and not to relax the legs, holding their weight with the hands. You can keep the legs shoulder-width apart or together. For beginners, it is permissible to slightly bend the knees.