RT has involved a variety of robotic devices and treatment protocols, which may be one of the causes of inconsistent results among studies. For example, two of the most-studied devices, the InMotion (IMT) 3.0 robot (Interactive Motion Technologies, Watertown, MA; Krebs et al., 2007) and the Bi-Manu Track (BMT) robot (Reha-Stim, Berlin, Germany; Hesse et al., 2003), involve different protocols. The IMT focuses on training of the paretic arm, whereas the BMT emphasizes bilateral arm training. Unilateral and bilateral RT could result in differential improvements in stroke patients. Previous studies have shown that the bilateral BMT may be favorable for decreasing motor impairments in the proximal arm, whereas the unilateral BMT may be optimal to improve the efficiency of affected arm function (Wu et al., 2013; Yang et al., 2012). Although initial studies compared the effects of unilateral and bilateral BMT, evidence of the relative effectiveness of different types of robotic therapy is limited