Both groups were given 3 applications of PSW treatment per week, totaling 9 sessions. The PSW treatment was administered using a standard size malleable electrode applied on the anterior area of the thigh, 5 cm above the superior border of the patella, and a second electrode applied on the posterior area of the leg, with the participant positioned supine. The knee was kept in semiflexion at 20 degrees. The control group did not receive any form of treatment, and all participants in this group were instructed to maintain their daily activities. A placebo group also was established, for which the PSW device was turned on but kept in standby mode during 19 minutes without any electrical current being applied. The participants in the placebo group also received 9 sessions of treatment. The control and placebo groups were used for comparison of the results of the low-dose and high-dose PSW groups. It is important to highlight that the therapists did not remain beside the participants during treatment to avoid