The present study will use transcranial electrical stimulation (tES) which are transcranial direct current stimulation (tDCS) and transcranial alternating current stimulation (tACS) combined with conventional physical therapy and cognitive-motor dualt ask gait training in sub-acute (at least 2 weeks after stroke onset) to chronic stroke (within 5 years post-stroke) to investigate changes in brain hemodynamics (oxy-hemoglobin and deoxy-hemoglobin concentration) as measured by functional near infrared spectroscopy (fNIRS). The findings may provides insights changes in combining tES with rehabilitation on improvements in brain hemodynamics in sub-acute to chronic stroke.