Form follows function · the chain beat
Tension generated in the foot reaches the opposite shoulder. The fabric is continuous, and force passes through it.
Part I · The path
The toe push loads the plantar fascia. The fascia tensions the arch. The arch transfers up. The transfer doesn't stop at the leg.
Vleeming et al., Spine 1995 — posterior thoracolumbar fascia and load transfer from spine to legs.
Part II · The transmission
Push the button. Watch a single firing of the chain.
The chain fires every step. The chain fires when you stand and shift weight. The chain fires when you rotate to look behind you. The fabric never stops transmitting.
Part III · Failure mode
Every step compensates somewhere. The somewhere is wherever the chain ran out.
Select a weak link
Part IV · The evidence base
A systematic review weighed each. The bars show what held up.
Wilke J, Krause F, Vogt L, Banzer W. What is evidence-based about myofascial chains: a systematic review. Arch Phys Med Rehabil 2016;97:454-461.
The three tiers
The thoracolumbar fascia transmits force from gluteus maximus to contralateral latissimus dorsi. This has been demonstrated in cadaver dissection and confirmed in vivo. The chain exists.
Multiple fascial chains have been described. The systematic evidence supports some pathways more strongly than others. The body is connected; the precise mechanical role of each named chain is still being characterized.
The failure modes in Part III are illustrative — they show where load tends to land when a given link is weak. Real bodies have multiple weak links simultaneously, and the compensation pattern is rarely as clean as a single toggle.
Where in the chain
did the load arrive?