BACKGROUND: What are the effects of walking training on the ground in an unsupervised manner and with different weekly durations after chronic stroke? OBJECTIVE: To compare the effects of unsupervised walking for 150 and 300 minutes per week on walking performance, speed, and functional mobility in individuals with chronic stroke. DESIGN AND SETTING: Randomized clinical trial was conducted at Rede Sarah Rehabilitation Hospital (Sao Luis, Brazil). METHODS: Individuals included (n = 40) were assessed using the 6-minute walk test (6MWT), functional mobility using the Timed Up and Go (TUG) test, and the Five Times Sit to Stand Test (FTSST). They were assigned to the two experimental groups and instructed to walk 150 (G150) or 300 minutes per week (G300) and to perform unsupervised gait training for the next eight weeks. RESULTS: No significant differences were observed between the group factors and no significant interaction was found for the group x time interaction, indicating that G150 and G300 changed similarly. The comfortable walking speed increased for both G150 and G300, resulting in a large effect size. Performance on the TUG and 6MWT also improved, but the effect size was small. For maximum walking speed, despite the improvement in performance in G150 and the G300, effect size was medium for both groups. The same was true for the FTSST. CONCLUSION: Unsupervised walking was effective in improving gait performance and functional mobility in individuals with chronic stroke regardless of the recommended weekly duration (150 or 300 minutes). CLINICAL TRIAL REGISTRATION: RBR-5g4g9bq (https://ensaiosclinicos.gov.br/rg/RBR-5g4g9bq).

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