Remote Cognitive-Motor Training Combining Mental and Physical Practice for Freezing of Gait in Parkinson Disease: a Randomized Controlled Trial

BACKGROUNDFreezing of gait (FOG) is a disabling feature of Parkinsons disease (PD). Although physical practice (PP) improves gait, maintaining gains remains challenging. Mental practice (MP), including Dynamic Neuro-Cognitive Imagery (DNI), may enhance gait control, but evidence on remote combined interventions is limited. PURPOSETo investigate whether adding MP grounded in DNI principles to remote physical practice supports greater and more sustained improvements than remote physical practice alone in people with PD and FOG. METHODSA prospective, single-blind, parallel-group randomized controlled trial was conducted. Forty-three participants with idiopathic PD and FOG were randomized to an experimental group (EG, n = 20) or control group (CG, n = 23), stratified by cognitive performance. Both groups received 10 remote sessions over 6 weeks. All performed structured physical practice targeting gait components; the EG additionally performed MP based on DNI, while the CG performed time-matched seated stretching. Assessments were conducted at baseline (BI), post-intervention (AI), and 30-day follow-up (FU). The primary outcome was Rapid Turns Test performance; secondary outcomes included FOG severity, motor aspects of daily living, mobility-related quality of life, and global cognition. RESULTSAll randomized participants were included in intention-to-treat analyses; 38 completed all assessments. Significant group x time interactions were found for Rapid Turns Test duration (p = 0.0019) and FOG time (p = 0.0108). Both groups improved short-term, but only the EG maintained gains at follow-up. Additional interactions favored the EG for mobility-related quality of life (p = 0.001) and global cognition (p = 0.0018). Self-reported FOG improved over time in both groups (p < 0.001) without between-group differences, while motor aspects of daily living showed a time effect only (p = 0.001). CONCLUSIONMP based on DNI principles may enhance retention of gains when combined with remote physical practice, supporting its use as an adjunct in FOG rehabilitation. Trial registrationThis trial is registered at ClinicalTrials.gov with trial registration number NCT06957405 (registered on April 25, 2025). Protocol and statistical analysis planThe full trial protocol and statistical analysis plan are available upon request from the corresponding author. Data sharingThe datasets generated, used and analyzed during the trial are or will be available from the corresponding author upon reasonable request. Funding and conflicts of interestThis article was produced as part of the activities of FAPESP Research, Innovation and Dissemination Center for Neuromathematics (grant #2013/07699-0, Sao Paulo Research Foundation). Co-author PRS received individual support from FAPESP (grant number 2025/14403-7). The authors declare no conflict of interest.