Abstract: Apparatus for electrical stimulation includes a garment, including an elastic knitted fabric, which is shaped and sized to fit snugly over a part of a body of a human subject, and at least one electrode, which includes an electrically-conductive yarn interknitted with the elastic knitted fabric in a predefined location so as to make electrical contact with a skin surface of the human subject when the garment is worn on the body. Stimulation circuitry is configured to apply an alternating electrical current to the at least one electrode.