The function of ultrasound in electrostimulators utilizes high-frequency sound waves that are inaudible to the human ear. These waves are generated by a special device head and penetrate deep into body tissues such as muscles, tendons, or joints. In the affected area, they cause a so-called micromassage, which are gentle vibrations at a cellular level. This process generates heat directly within the depth of the tissue, leading to improved local blood circulation, release of muscle tension, and pain relief. This method is often used to support healing after injuries or in cases of chronic conditions. Some devices combine ultrasound with electrical stimulation, allowing the effects of both therapies to complement and enhance each other.
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