During standard massage techniques, PTs use their hands so that there is direct, skin-to-skin contact. During an IASTM treatment, a physical therapist uses a metal or plastic tool to provide soft tissue massage and mobilization.
This tool is gently (or vigorously) scraped and rubbed over the skin. The rubbing of the instrument is used to locate and release tightness in the fascial system—the collagen covering the muscles.