The benefits of ultrasound lie in its interaction with cells and tissues. The affects of acoustic vibrations on the body were studied as early as the 6th century AD. Ultrasound gained widespread acceptance as a therapeutic treatment in the 1940's even though many people today only recognize ultrasound for imaging. Ultrasound therapy has always been attractive because it is completely non-invasive and non-pharmaceutical.
Ultrasound therapy sends a compression wave into the body which exerts a physical force on the tissue, blood vessels, and bones. This compression wave produces the well known benefit of deap heating, but it also increases circulation and flexibility in the area by pushing/pulling nutrients through the cellular structures. This highly dynamic environment is perfect for helping areas recover after activity or heal after an injury.
Ultrasound has traditionally been applied in short, high intensity bursts from large systems. However, current research indicates that low heat, long term ultrasound treatments provide an overall better therapy by fully saturating an area and creating a sustained environment for enhanced healing
Longer term treatments mean the increased blood flow and heat is maintained throughout long recovery periods. The body gets more of the nutrients it needs directly where it needs them.