Most stroke survivors have upper limb motor impairments, along with difficulties in performing activities of daily living . Currently, there are several known intervention treatments for functional recovery of the upper limb after stroke.
Constraint-induced movement therapy (CIMT) has been shown to enhance hemiplegic upper limb functions at both early and late stages of post-stroke . The test was developed by Taub et al.  to improve the function of the affected upper limb by limiting the motion of the intact upper limb and induce affected upper limb movement [4, 5]. The original CIMT program consisted of 2 weeks of restraining the unaffected upper limb for 90% of waking hours combined with forced use of the affected upper limb for approximately 6 hours per day during task-oriented activities. However, Page et al.  reported that 68% of 208 stroke patients said that they were disinterested in participating in CIMT. One domestic research study showed that 12 out of 46 patients dropped out when they participated in CIMT lasting for 14 hours daily for 2 weeks. The most common reason for dropping out in this study was the lack of participation in training time . Therefore, in a clinical setting, various modified CIMT methods have been developed to improve participation rates.
Recently visual biofeedback training (VBT) has been studied and introduced as a therapeutic option because VBT might improve motor performance by effectively tuning the control structure . Also, Kim et al.  reported a significant effect of spatial target reaching training based on visual biofeedback of the upper limb function in hemiplegic subjects. In their previous article, VBT group showed more significant improvement than the control group in the Wolf Motor Function Test (WMFT) and the Fugl-Meyer Assessment (FMA).
Several other studies have also been developed that recognize the effect of CIMT combined with other treatments [10, 11, 12]. In these trials, unaffected upper limbs were restrained for several hours daily, even when participants were not taking other combined therapies. However, it is not easy to apply restraint for more than 5 to 6 hours daily in a clinical setting and longer restraint times can compromise a patient’s therapeutic compliance. To overcome these limitations, it is necessary to find out whether there is any modified therapies have any effects such as a reduced restraint time in CIMT during combined therapy.
In this study, we applied a new CIMT protocol in a clinical setting, while maintaining the existing concept of CIMT. Both CIMT and VBT were performed simultaneously for 1 hour daily for 2 weeks. CMT is hereafter referred to as ‘short-term’ CIMT. We examined the effects of short-term CIMT combined with VBT on gross and fine motor functions and daily functions in patients with subacute hemiplegic strokes. We hypothesized that study participant who received short-term CIMT with VBT would demonstrate more improved outcomes than patients who received VBT alone.