H- wave is used to aid in the healing of muscles, nerves and tendons as well as in the reduction of pain and oedema by mimicking the Hoffman reflex which allows for deeper penetration of the treatment. It causes a contraction of the tissues flushing out areas of oedema and stimulating nerves just as TENs does to reduce pain.
H-wave stimulates the small smooth muscles within the lymphatic system to contract, leading to oedema reduction and increased removal of waste products and in turn a reduction of pain. Just like heat and cold.
In addition, there is an increase in blood flow to the area which brings new nutrients and oxygen to the treated area which promotes faster recovery and healing of tissues similarly to how heat and PEMF increase healing rate.