Ribcage Dimensions, Gait, Foot Arch – Movement Debrief Episode 56

Movement Debrief Episode 56 is in the books. Below is a copy of the video for your viewing pleasure, and audio if you can’t stand looking at me.

Here is the set list:

  • How does rib external and internal rotation relate to infrasternal angle?
  • Why does the infrasternal angle measures present as they do?
  • What are the anteroposterior and medial-lateral dimensions of the ribcage in these infrasternal angles?
  • What are the thoracoabdominal pelvic cavity mechanics in gait?
  • How does a collapsed arch impact movement variability?
  • How do we treat a collapsed arch?
  • Are custom orthotics a worthy solution?

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


and the audio version…

Zac Cupples iTunes                

Here were the links I mentioned:

Sign-up for the Human Matrix in Seattle, WA on September 15-16th here

Sign up for the Human Matrix in Kansas City, KS on October 27-28th here


Sign-up for the Human Matrix in Portland, OR on November 10-11 here

Mechanics of the respiratory muscles

Action of the diaphragm on the ribcage

Below is the diaphragm picture I mentioned. Notice how from this angle, the diaphragm fibers would pull the ribcage inward.



Courtesy of openstax

Here is a bunch of stuff on the infrasternal angle.

Human resting muscle tone (HRMT): narrative introduction and modern concepts.

Paul Coffin, DPM (this is who I use to get orthotics)

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Table of Contents

Ribcage Dimensions


Foot Arch