Infrasternal Angles, Spinal Lordosis, and Restoring Shoulder Motion – Movement Debrief Episode 27

Movement Debrief Episode 27 is in the books. Here is a copy of the video and audio for your listening pleasure.

Here is the set list:

  • The three types of infrasternal angles
  • Anatomical theories regarding the infrasternal angle
  • Infrasternal angle treatment
  • The different positions of the lumbar spine
  • Restoring lumbar position
  • Restoring cervical spine position
  • My treatment sequence for restoring shoulder motion
  • Which are my favorite hikes

If you want to watch these live, add me on Facebook, Instagram, or Youtube. They air every Wednesday at 7:30pm CST.


Zac Cupples iTunes                

Here were the links I mentioned:

Bill Hartman

Pre-existent vertebral rotation in the human spine is influenced by body position.

Right thoracic curvature in the normal spine

Analysis of preexistent vertebral rotation in the normal spine.

Effect of changes in pelvic tilt on range of motion to impingement and radiographic parameters of acetabular morphologic characteristics.

PRI Craniocervical Mandibular Restoration

PRI Vision

Here is the exercise I mentioned from Daddy-O Pops for a retracted and elevated scapula.

Enhancing Life

Method Strength

Andy Mccloy 

Trevor LaSarre

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Check out the mentor program

Infrasternal Angles

Spinal Lordosis

Restoring Shoulder Motion


  1. Hey Zac, awesome talk. When you are doing a reaching exercise for a narrow ISA, would this be something like the 90/90 right arm reach from PRI ? And, would you then alternate reaching both arms rather than just the right? Thanks, Marcel

    1. Hey Marcel,

      Glad you enjoyed the talk my guy.

      I have the client reach on the same side as the narrow ISA. Since most asymmetrical cases would be narrow on the left, I’d go with a left reach. Though most peeps are either narrow or wide bilaterally. Once you close the angle, use the rest of your testing to guide you.

      Hope this helps,


      1. Awesome, thanks Zac.
        If one side is narrow and one side wide, but the total is 90 degrees are you cool with that, or do you try to balance them?
        I have been playing around with the 90/90 pullover with a kettlebell (from Bill Hartmans book) and it is amazing how quickly the angle changes.
        I am currently going through PRI and it is really mind blowing although quite complex. It seems like you have gone through all the PRI stuff, and now moved away a bit to simplify things?

        1. I try to keep a balanced 90 as best as possible. Could have one side very “narrow” and another side relatively “wide”, yet still be asymm…testing in extremities ought to reflect that as well.

          Your ascertations regarding me and PRI are accurate. While I’m grateful they exposed me to much of this stuff, as you read other sources and explore other avenues, you find a system that works for you, and most importantly your clientele. That’s the process I am in, and the simpler it can be made, the better it can be replicated by others.

          Great questions my guy!


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