Percussion therapy provides rapid bursts of pressure into the muscle tissue of the body. Massage guns are devices that utilize percussion therapy as their form of deep soft tissue manipulation. The head of the massage gun oscillates back and forth on your muscles to give you the effect. Generally, this oscillation is somewhere in the range of 1,000 to 10,000 percussions per minute. This helps in relaxing the fascia and increasing blood flow to the targetted area. In fact, certain models allow you to adjust the speed depending on your requirements.