Hard Outer, Soft Inner

Within Whole Body Breathing, the body can be generally separated into a harder outer and a soft inner. The soft inner is generally referred to as containing the viscera - the soft tissue and organs, as well as the generally softer/less dense anterior hard tissue which contains it.
In this model (which can be moved, zoomed, and rotated) the red lines are the “soft inner”, the blue lines are the “hard outer”, and the green domes are the diaphragms. See
Multiple Diaphragm Model
The Hard Outer Line consists primarily of, from bottom to top:
  1. Top of the foot
  1. Anterior Tibial Tendon
  1. IT Band
  1. Outer Hips and Thoracolumbar Fascia (Merge with Legs Soft Inner)
  1. Spine, Meninges
  1. Shoulder Blades → Shoulders, Triceps, Outer Forearm, Outside of Hand
  1. Scalene Muscles into cranial meninges, Nuchal Ligament into the scalp
Peripheral muscles of this group would include everything part of the “hard outer” part of the body - anterior shin, quadriceps et al, quadratus lumborum and latissimus dorsi, trapezius and SCMs et al
The Soft Inner Line consists primarily of, from bottom to top:
  1. Bottom of the Foot
  1. Achilles Tendon
  1. Inner Thigh Adductor group,
  1. Psoas to Thoracolumbar Fascia (Merge with Legs Hard Outer)
  1. Linea Alba and Sternum - in a compensated pattern, the viscera of the stomach and chest would take on a bigger role
  1. Infra and Supra Hyoid Muscles
  1. Viscerocranium
Peripheral muscles of this group would include everything part of the “soft inner” part of the body - calf, inner thigh, viscera and pleura of the torso, inner neck muscles, tongue and pharyngeal muscles / fascia et al
The following image is a good approximation (though not exact to WBB theory) of how the hard outer and soft inner lines balance eachother out. The 7 Diaphragms merge between the two lines and provide tensegrity and struts - the entire body inflates and deflates at once using tension along these lines
notion image