The psoas muscle attaches at one end to the lumbar vertebrae. After folding around the front of the pelvis the other end attaches to the inside of the femur, just below the neck, at the lesser trochanter. This point is towards the rear of the inner surface of the femur.
In terms of stretching the psoas muscle it can be useful to think of the psoas in two parts, the upper psoas muscle and the lower.
You may find that to stretch the upper fibers, those that attach to the renal fascia, or if you like, to the backs of the kidneys, you can focus on lifting the 12th pair of ribs (to which the renal fascia have an attachment).
To stretch the lower portion, you may have to flatten the curve of the lumbar spine.
Both of these actions can be done while standing upright with knees straight.
Standing Psoas Stretch | Standing Psoas Stretch Variations
To get to the thigh bone from the lumbar spine, the psoas actually passes beneath the inguinal ligament.
This ligament can be used as a reference flattening the lumbar spine to stretch the lower fibers of the psoas.
Standing upright with feet parallel and knees slightly bent, :
Draw your lumbar vertebrae away from your inguinal ligaments so that the back of your lumbar spine flattens.
Your pelvis will more than likely tilt back as a result, that's fine, but rather than focusing on tilting your pelvis back, focus on flattening your lumbar spine so that your pelvis tilts back as a result of that.
Relax and repeat this action so that you get used to doing it without having to think about it.
Once you get a feel for the action, work at making both actions (flattening and then relaxing) slow and smooth.
You may notice that as you flatten your lumbar spine, you lower belly pulls in. This may be more likely to happen if you focus on pulling your lumbars away from your inguinal ligaments.
The lower transverse abdominis attaches to the inguinal ligament (as well as the ASICs) and your lower belly pulling it is a sign that they, the lower fibers of the Transverse Abdominus, are contracting.
Note that because the knees are slightly bent you may not be stretching your psoas yet (unless it is particularly tight).
An action that may help in stretching the lower fibers of your psoas is pulling your tailbone towards the pubic bone so that the pelvic floor muscles activate.
For guys the amount of movement of the sacrum relative to the pelvis will probably be very slight, none the less, the muscle tension created may be helpful in stabilizing the SI Joint.
That in turn may make it easier to stretch your psoas.
Note that drawing the tailbone towards the pubic bone is not the same as tilting the pelvis back. Instead this actions shortens the distance between tailbone and pubic bone by tilting the sacrum backwards relative to the pelvis. The amount of tilt will be slight, barely perceptible. But see if you can feel a change in tension when doing this action.
To practice it draw your tailbone towards you pubic bone, then relax. Then repeat.
To combine these actions
All of these actions so far will probably affect the lower fibers of the psoas. To affect the upper fibers lift your back ribs. Here again, practice this in isolation.
Now there are two possible sequences for putting all of these actions together, and I'd suggest playing with both to find the one that feels best, or easiest to implement.
If you have difficulty with any of the actions, you may find it helps to lead with that action.
Now so far we've only talked about affecting the upper point of attachment of the psoas.
To stretch the psoas we need to work on both ends, fixing one end (either the upper end or the lower end) while drawing the other end away from it.
By doing the above actions first (activating pelvic floor, flattening lumbar spine, lifting lower back ribs), you secure the upper end.
Note that one way that you could deepen the psoas stretch is to press your hips forwards. If doing this, work at keeping your lumbar spine flat (and your pelvic floor muscles activated). Also keep pressing rearwards through your inner thighs.
In the lying psoas stretch the psoas stretch is accentuated by reaching the arm past the head. You can do the same in the standing psoas stretch, reach both arms upwards and while doing so focusing on lifting the ribs and in general lengthening your spine upwards.
I'd suggest that this action is separate from lifting the lower back ribs. The feeling (and the effect) is slightly different. Lifting the arm and reaching the ribs up tends to affect the sides of the ribs more than the back, especially if reaching with both arms at the same time.
To that end, if you start with your arms lifted, but relaxed, then after activating your pelvic floor, flattening your lumbar and lifting your lower back ribs, then reach the arms up and lift the side ribs at the same time.
With practice all of these little actions become automatic and you can do them without having to think about them, while still being able to notice whether or not you've done them.
Continue reading Psoas Stretch Variations.
More Hip Flexor Stretches
Counter Psoas Stretches with Glute Stretches