Introduction: Cerebral palsy is a non-progressive disorder caused by damage to the immature brain. It results in motor impairments that are often accompanied by cognitive deficits. Gait is one of the most commonly affected functions in individuals with CP. The majority of research on the efficacy of intensive therapeutic interventions for gait improvement focuses on children and adolescents, while the changes attainable in adulthood remain poorly investigated. Purpose: The aim of this study was to evaluate gait changes in an adult with cerebral palsy following a period of intensive therapeutic treatment. Methods: A case study design was employed. A 22-year-old male with spastic diplegia, classified as GMFCS level I, participated. Assessments were conducted before and after the physiotherapy treatment. Outcome measures included the RAND-36 questionnaire, the Modified Ashworth Scale, the 10-Metre Walk Test (speed, cadence), spatial gait parameters, the Timed Up and Go test, and the Six-Minute Walk Test. The physiotherapy treatment was conducted three times weekly and comprised 50 sessions, including functional gait training, gait practice, muscle strengthening exercises, outdoor walking, and racquet sport, padel. Results: Clinically significant improvements were observed following the physiotherapy treatment. Comfortable gait speed increased by 11.6% (0.16 m/s), and fast gait speed increased by 28.6% (0.54 m/s). Cadence increased by 11 steps per minute during comfortable walking and by 32 steps per minute during fast walking. The Six-Minute Walk Test distance increased by 179 metres (31.1%), and the Timed Up and Go time decreased by 0.99 seconds (19.6%). The physical functioning domain of the RAND-36 questionnaire improved by 25 points. Spasticity, assessed with the Modified Ashworth Scale, remained unchanged. Reduced variability in right step length and width during fast walking was also observed. Discussion and conclusion: The results indicate that intensive, function-oriented therapeutic treatment in an adult with spastic CP led to clinically significant improvements in gait speed, gait endurance, functional mobility, and quality of life, without changes in spasticity. The findings support the implementation of intensive programmes in adulthood and contribute to the limited literature in this field. Due to the case study design, the results cannot be generalised, and further research with larger samples and long-term follow-up is warranted to enable broader generalisation of the findings.
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