Task-specific training is recommended for motor improvements in children with cerebral palsy (CP), as well as its association with other approaches, such as augmented reality (AR). To ensure the effectiveness of these interventions, assessing their feasibility is essential.

To evaluate the feasibility of implementing the INTERACT protocol (IN - individualized; T - task-specific; E - environment; R - real and augmented realities; ACT - active training) in children with CP.

A randomized clinical trial (RCT) was conducted with five children with spastic CP: INTERACT group (IG) (3) and control group (CG) (2), with a mean age of 10.6 years (SD = 1.82), GMFCS levels I and II, and MACS levels I, II, and III. Feasibility was assessed using a Google Form, considering the perspectives of caregivers and children during recruitment (adherence), evaluation, and intervention (adherence, adverse events, duration, comprehension, and execution). Satisfaction was measured using a visual scale. Recruitment feasibility was determined by the percentage of families who agreed to participate relative to the total number of families contacted. Adherence was assessed by the percentage of scheduled sessions attended. Adverse events were recorded based on the percentage of sessions in which undesirable reactions occurred. In the questionnaires, items related to children's and caregivers' perceptions, such as duration, were rated from 1 (“Very inadequate”) to 5 (“Very adequate”). Comprehension and execution were scored from 1 (“Very difficult”) to 5 (“Very easy”). The INTERACT protocol included: a) Initial assessment: manual reach kinematics, sit-to-stand kinetic movement, functional reach, upper limb activities, goal setting and quantification, and the Challenge test, with an average duration of 6 hours. b) Intervention: 16 hours of training over four weeks, conducted three times a week in 1h20min sessions, using motor learning principles, active and individualized exercises based on child-selected tasks, enriched environments, and AR context. The CG underwent physiotherapy without AR, with the same training volume as the IG.

Among 12 contacted families, 7 agreed to participate (recruitment rate: 58%). Five children were included and attended all assessments (adherence rate: 100%). Evaluation: a) Duration: 60% of children considered it adequate, and 40% as very adequate. Among caregivers, 20% rated it as adequate and 80% as very adequate. b) Comprehension: 20% rated it as moderate, 40% as easy, and 40% as very easy. c) Execution: 20% of children rated it as very easy, 40% as easy, and 40% as neutral. One adverse event was recorded, achieving a feasibility rate of 92%. Intervention: a) Adherence: 88%. Four adverse events were recorded, resulting in 90% feasibility. b) Duration: 66.7% of children and caregivers rated it as adequate, while 33.3% of both rated it as very adequate. c) Execution: 33.3% rated it as easy, 33.3% as moderate, and 33.34% as difficult. d) Satisfaction: Among 43 sessions, 53% reported “loved it,” 42% “liked it,” and 5% “neutral”.

The INTERACT protocol appears feasible for caregivers and children, considering evaluation, intervention, and satisfaction.

Feasibility studies support RCT development, preventing unfeasible or unsafe interventions and optimizing financial and human resources.