Janu Sirsasana stretches the feet, the calves, the hamstrings, the low back, the hips, the sides of the waist, and even the upper back, and back of the neck! I mean, WOW! So much in one simple pose! How much you feel all these things is like the old standby piano analogy of “you get out of it what you put into it”. But wait, there’s more!