Cycloidal Vibration Therapy (CVT) is type of non-invasive mechanical massage therapy that employs a specialized motor to generate non-percussive vibrations at its surface in three orthogonal directions. This type of three-dimensional (3D) cycloidal vibration (CV) has been shown to increase blood circulation and lymphatic drainage by stimulating deep muscle activity and is used to treat a variety of medical conditions.

https://en.wikipedia.org/wiki/Cycloidal_vibration_technology