BACKGROUND: This study aimed to determine the effect of task-oriented treadmill training with high-intensity interval training compared to high-intensity interval treadmill training on the walking ability of patients with chronic stroke. METHODS: Data from 34 chronic stroke patients who were randomly assigned to experimental (17) and control (17) groups and completed the study were analyzed. The experimental group underwent task-oriented treadmill training with high-intensity interval training, and the control group received high-intensity interval treadmill training for 30 minutes per session, 3 times a week, over a period of 4 weeks. Statistical significance was confirmed through a 2-factor repeated measures analysis of variance. RESULTS: There was an interaction effect between time and group for 10-Meter Walk test (10MWT), functional gait assessment (FGA), 6-Minute Walk test (6MWT), and timed up and go (TUG) (p < 0.05). post hoc tests revealed that 10MWT, FGA, and 6MWT showed significantly greater improvements in the eg, compared to the CG (p < 0.025), and in the intragroup comparison, both eg, and CG showed significant improvements over time (p < 0.017). The TUG showed no significant difference in comparison between groups (p > 0.025), and in comparison within groups, both eg, and CG showed a significant decrease over time (p < 0.017). CONCLUSION: Clinically, despite being a chronic stroke patient, repetitive and meaningful task training combined with high-intensity training is thought to be helpful in improving walking ability and returning to the community.

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