According to the Theragun website, their devices are designed to release muscle fascia. Fascia is a connective tissue that surrounds and supports your muscles. It can become tight and restricted due to overuse, injury, or inflammation. This can lead to pain, reduced range of motion, and decreased performance. The Theragun uses percussive therapy to deliver rapid pulses of pressure into the tissue. This helps break up restrictions and improve blood flow. While there is no scientific evidence to support these claims, many users report feeling relief after using the device.