The Vrikshasana may seems as another easy posture but it is not a resting asana. Your back should be aligned property (extended), your hips should be at one level, and since your stability depends on the distribution of your weight on your standing leg ensure you do while maintaining and improving your balance.
How to Perform:
step 1: Samasthithi, with both your hands high up in the air. Feel the stretch in both your arms and your torso.
step 2:Shift your weight slowly to your left leg, firmly on the floor.
step 3:Take a deep breath and bend your right knee.
step 4:With your right hand, hold your right ankle and draw the right foot upwards.
step 5:Place your right foot against the inner part of the left thigh and press the foot’s heel . Keep the toes of the right foot pointing towards the floor.
step 6:Ensure that your pelvis is straight and its center is directly over the firmly planted left foot. Rest your hands around the pelvic rims.
step 7:Bring your hands in front of the chest, folding them in the Anjali mudra(Namakara), close your eyes and relax your mind.
step 8:Remain in this pose for a few minutes and breathe deeply. Now begin to unfold slowly and come into the mountain pose.
step 9:Repeat with the legs reversed.
If you suffer from severe headaches frequently, you must not practice this exercise. Those who face sleeping problems like insomnia are also advised not to attempt this pose. People suffering from low blood pressure or high blood pressure must also refrain from doing such asana. If you have high blood pressure, you must not raise your hands over your head for too long as this may affect your heart and there is risk of heart attack. In such cases, you can place your hands on your chest, where the thymus glands are present. This helps in activating them. If you face any problems while you do Vrikshasana, you may consult a qualified yoga teacher and take his advice or take the advice of your doctor.