Stroke is the leading cause of neurological disability and hemiparesis is its most common sequelae. The physical and functional limitations combined with the influence of environmental factors directly affect an individual's functionally. For an effective neurological rehabilitation, it is essential that physiotherapists know the patient's functional profile in order to plan the treatment to meet his/her real needs. Objective: To analyze the functional activities and influence of environmental factors in poststroke hemiparetic patients before and after physical therapy. Method: Twelve post-stroke hemiparetic patients were evaluated before and after 20 physical therapy sessions with the Barthel Index (BI) and an evaluation model based on an abbreviated core set of the International Classification of Functioning, Disability and Health (ICF) for stroke, based in the generic qualifiers system of the ICF. Results: There was significant improvement for the activities walk (d450) (p = 0.0033), dress (d540) (p = 0.018) and eat (d550) (p = 0.018) for the evaluation model based on the ICF. According to the BI, significant improvement was detected for the activities of feed (p = 0.0341), dress (p = 0.0277), toilet (p = 0.0117), and up/ down stairs (p = 0.0077). The environment factors immediate family and health professionals were the most positive influence on the health status of patients. Conclusion: Physical therapy was effective for improving the condition of patients since, according to the patients, some daily activities can be performed with more ease at the end of the physical therapy treatment. To meet their needs, it is important to develop an individual treatment plan, emphasizing the context in which he/she is inserted, in order to address the real limitations on activities and restrictions to participation.