Final answer:
High frequency ultrasound is used for toning and stimulating effects on the skin through a process called ultrasound diathermy. It generates heat in the tissue to increase blood flow, promote healing, and reduce inflammation in injured muscles.
Step-by-step explanation:
The high frequency is used to produce toning and stimulating effects on the skin through a process called ultrasound diathermy. Ultrasound diathermy is a deep-heat treatment commonly used in athletics and physical therapy to relieve pain and improve flexibility in injured or overworked muscles.
When the therapist applies high-frequency ultrasound to the skin, most of the energy is converted to thermal energy, which generates heat in the tissue. This heat helps to increase blood flow to the area, promoting healing and reducing inflammation. However, it is important for the therapist to have the skill to avoid overheating and tissue damage.