Anodal Transcranial Direct Current Stimulation (a-tDCS) utilizing a weak current to modulate brain activity. However, most a-tDCS studies have typically targeted primary motor cortex (M1) or cerebellum as a single-site stimulation technique to induce the modulatory effects, which does not align with neurobiological studies showing concurrent activation of the M1 and cerebellum during a motor task. Thus, this thesis introduced a novel stimulation technique of concurrent bilateral stimulation of M1 and cerebellum in a series of proof-of-concept studies on its effects on cortical excitability and balance, and investigated the effects of increased cognitive load on balance in healthy young adults