synonyms
core, dan-tien, torso strength, bracing, act of bearing-down, valsalva
function
utilising the muscles above, below and surrounding the torso, inward pressure is produced synergistically; thereby turning the torso into one solid unit, like a stone pillar
how to achieve functional IAP
stand straight with your feet hip-width apart
stiffen up the side and front of you abdomen *if you can't do this, try bearing down (like trying to pass gas)
holding the stiffness, breath in and out without letting go of the stiffness
practice moving, breathing and bending at the hip while maintaining constant IAP