<qa>  How long will the sessions last?The sessions took place in the first hour of dialysis and will last at least 20 and maximum of 34 minutes. The parameters selected in the stimulator will be: 80 Hz frequency, 0.4 ms pulse, 10 s time on, 50-20s time off, intensity as patient tolerance. The patient will be positioned supine, the knees will be at 60 flexion through a foam wedge and ankles restrained by a band to make isometric exercise. 