In the beginning, it might be a little challenging to stay in this asana for a long time. There is an easier variation with both knees bent to the floor. Those with sensible or weak wrists can practice this pose on their forearms, but this version also requires more core strength. There is also an option to lift one leg at a time in order to make this pose even stronger.
Phalakasana is part of the vinyasa sequence and many versions of Sun Salutations. One should focus on the breath and on building the inner strength while practicing this asana.
Phalakasana is great for stimulating the manipura (solar plexus chakra). This chakra helps to balance confidence, inner strength and humility. If it is out of balance, stagnation, self-doubt and arrogance may occur.