This topic of low back tightness resulting in an exaggerated S curve of the spine, pelvic instability and deep core inhibition comes from my own personal experience.
I was a child gymnast, which likely contributed to this pattern due to the constant butt out/back extension poses.
IMPORTANT: this pattern has no relation to low back PAIN, and I never EVER recommend that you release the low back fascia or muscles when you are experiencing low back pain of any kind (whether sciatica, SI joint pain, soft tissue pain in your QL’s or anything else).
When your low back muscles and fascia become exceptionally restricted and shortened, your abdominal fascia (including the muscles but also your organs) has to stretch to accommodate the low back contraction. This can result in your abdominals always feeling “tense” because they’re in a constant stretch and can never relax into their natural position. This can then result in abdominal or core inhibition, when these muscles have a hard time firing because the low back is so tight it won’t accommodate the muscle contraction on the front.
All of this can lead to pelvic instability, most likely due to the deep core muscles such as the TVA and pelvic floor muscles not doing what they’re supposed to do.
Yep, your SCM’s will try to stabilize your spine when you don’t have full control over your abs!
As you can see, this pattern can become complex due to all the possible compensations. Which muscles YOUR body chooses to use depends on your history of injuries, posture/alignment and other potential muscle activation issues.
With this particular pattern, however, I think the ONE most powerful action you can take is to release the fascia in your low back and around the tailbone.
If you’ve ever had an accident or fall in which your tailbone was the point of impact, chances are pretty high that you have restricted fascia in this area that can further deepen the restriction pattern.
So long as you don’t have low back PAIN, go try my tennis ball technique for low back fascia release.
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