For example, the pink circles on the photo show where the psoas in located. This important muscle
is worked on from the front of the body, but it's attachment points are along the spine and the femur. there are branches of nerves that pass through it making it very sensitive and it works closely with the quadratus lumborum (QL) in the back and the illiacus in the pelvis.
You know that Active Release you help us with when you lay on your side and the "drawing you bow" movement? That's us working on the QL and if your body lets us in, we soon move to the illiacus. These muscles are close friends of psoas and require to all be worked to acquire positive results.
As you can gather, the DFL influences the quality of movement you will achieve. While I love to promote yoga for opening the body, pilates is a real winner here when you want to strengthen and balance the deep core. Together the two exercise modalities can increase you stability and movement while expanding your breathing space.
If you're like me and love your weights, that's good too. As a myofascial trains practitioner I suggest full-body workouts such as squats to strengthen the entire trains and notice where your weak links are. For example, do your hips shift to one side during your squat?
Overall, whether you are experiencing issues in your jaw, your back, or your feet, an assessment into the DFL is probaby a good place to start.
"Good Posture can be successfully acquired only when the entire mechanism of the body is under perfect control."
-Josheph Pilates