Staying poses.

As hard and forces in legs are base for move and effect, as staying poses are study a first,as you can to ready for body to hard asanas, as inclines to front, and bending, where are teaching not hard.
Vrishasana is tree pose as balance pose, as stay in Tadasana, as base staying pose, all staying poses beginning with her, as stay straight, feet together, that heels and big fingers legs touched, strain knees,stretch to top a knee cups, short top hip sides and stretch back hip muscles, stretch in belly, breast to front, spine stretch up, neck keep straight, body weight spreading a same between heels and legs fingers.
Bend right leg in knee, and put right heel in a base of left hip with heel to groin, and fingers with down.

Balancing on left leg, connect palms and raise hands over head.

A keep pose a few sec, initial breath, not deep, through nose.

Low hands, palms open, straight right leg, return back to Tadasana, and relax, repeat pose, balancing on right leg, and left heel put in a base of right hip, doing pose with same time quantity in both sides.

Balancing on one leg helps to concentrate mind, as keep balance one leg on, as look fixing on a down point, as for look before itself to front is next balance studies, after look up, a most hard variant is keep  balance on one leg with closed eyes.

That pose tone muscles legs, training vestibular apparatus, balance and stability forming, concentrate attention, and good for nerve system.