Inclusion Criteria:  Age 18-80 years of age; CKD with glomerular filtration rate (GFR) between 15-59 ml/min (III and IV stage of CKD) for more than 3 months; To be able to ambulate > 300 meters in 6 minutes walk test.  Exclusion Criteria:  Cognitive dysfunction that prevents the performance of evaluations, as well as an inability to understand and sign the informed consent form; Intolerance to the electrostimulator and/or alteration of skin sensitivity; Skin lesions/burns at the electrode placement site; Patients with stroke in past 6 months with residual limitation to ambulation; Disabling musculoskeletal disease; Uncontrolled hypertension (systolic blood pressure > 230 mmHg and diastolic blood pressure > 120 mmHg); Grade III or IV heart failure (NYHA); Patient with a pacemaker; Uncontrolled diabetes (fasting blood glucose > 250 mg/dL); Unstable angina; Coronary stent placement in past 3 months; Recent acute myocardial infarction (two months); Fever and/or infectious disease; Peripheral vascular disease in the lower limbs that limits ambulation or deep vein thrombosis; Chronic obstructive lung disease that limits ambulation or need for oxygen therapy; Obesity (Body Mass Index≥35); Patient with active cancer.