The sample size was calculated considering the results of the Timed Up Go test reported by Yang et al., which involved a task-specific training program with individuals at the chronic phases of stroke. The Timed Up and Go test scores for the control and experimental groups at baseline were 14.3±7s and 14.6±7.4s, and after were 14.4±6.7s and 12.9±6.5s, respectively. Significant within and between-group differences were observed and the difference within the experimental group was -1.7±1.1s. Based upon this value, a sample size of 16 subjects per group, i.e. a total of 32 participants, would be required, considering a significance level (α) of 5% and a power of 0.80. Based on the assumption that about 15% of the participants may drop out during the course of the study, a target of 38 participants in total was set, 19 per group.