This pose is one of the most comfy ones for the lower back and hips. It will also stretch your neck, shoulders, and chest. Lie on your back and hug your knees into your chest. Breathe in deeply, and then exhale completely, lowering both legs to the floor on your left (keep your knees higher than your hips). Position your arms out to your sides, or place your left forearm on your right thigh (as pictured) to encourage a deep stretch, relaxing both shoulders to the floor. Shift your gaze over your right shoulder. Close your eyes, take 10 deep breaths, and then release. Repeat to your other side.
Why does it tighten down so much when overworking as a spinal stabilizer? Remember that length tension relationship we talked about? Well, if the psoas is tight, it can compress the spine easier, thus providing spinal stability. Plus, it has to work a lot to stabilize the spine. When you don’t have correct functioning of the diaphragm and abdominals, the psoas holds a great deal of tension to do the job. This tightness or tension makes it a very ineffective hip flexor.
Grade II (moderate): A larger tear in your muscle that makes it difficult to move and causes a moderate amount of pain, especially when you move the affected muscle, swelling, and tenderness. You may have 5 percent to 50 percent loss of function and you may be limping. You can't go back to sporting activities until the tear is completely healed. These injuries can take anywhere from a couple weeks to a few months to heal, depending on how bad they are.