The psoas muscle is the deepest muscle in the body, one on each side. It is the core muscles that many exercise practices seek to strengthen. While it may be a relatively easy muscle to strengthen, it can be harder to stretch. And, every serious exercise practitioner knows how important it is to stretch muscles that have been strengthened. Yoga for the Psoas contains all the stretches you could ever need to stretch the psoas. While there are more stretches available, the 34 presented here represent a wide variety of the best ones there are. They will surely give anyone a great psoas stretch. Where exactly is the psoas? It runs from the upper inner thigh up to the front inner hip, and then continues up diagonally through the belly to the lower inner spine. Its path is under all other muscles only coming near the surface in three places. There is more information in Yoga for the Psoas, but that is the basics. Its location is so deep that most massage practitioners don't know how to get to it. There are even very specialized classes for strengthening the core muscles. They often don't even mention the psoas because it is such an obscure muscle But, it is the main core muscle that is targeted in core strengthening classes. A really great thing about doing any yoga stretching those targets the psoas is that most of the body will get a great stretch and workout at the same time This is because of just how core the muscle is. Just about anything you do for the psoas will affect several other areas in the body. The only exceptions are the arms, neck and lower legs. Yoga for the Posas includes variations that insure a great stretch for the entire body. And, because of all the variations, just about anyone will be able to find a great workout for their ability level. If you want an easy workout, just do five to ten poses with some of the variations. A hard workout would only require 12 of the poses with some of the variations. Doing all the poses and variations would take two to three hours if you want a very intense workout Most of the poses will also help increase strength as well. That would include most of the body as well as the psoas in many cases. With all the variations, warmups and cool down there are around 50 poses. Try it out, see how tight or supple your psoas is by trying a few of the stretches included in Yoga for the Psoas.