To understand what Rolfing does, you need to understand fascia.
Fascia is the web of connective tissue that surrounds and connects every muscle, bone, organ, and nerve in your body. For a long time it was dismissed as simple packing material — the stuff anatomists cleared away to get to the interesting parts.
Research by anatomist Carla Stecco and researcher Robert Schleip changed that picture entirely. Fascia is not passive. It is not inert. It is one of the most richly innervated tissues in the body — and it plays a central role in how you feel, move, and organize yourself in space.
6–10×
More sensory receptors than muscle. Fascia contains far more proprioceptive and nociceptive nerve endings than the muscle it surrounds.
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Mechanoreceptors throughout. Fascia detects stretch, pressure, and vibration — contributing directly to your sense of where you are in space.
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Rich in free nerve endings. These contribute to interoception — the felt sense of your body from the inside. Pain that has no structural explanation often originates here.