ArticlemedRxiv : the preprint server for health sciences2025
Effects of Short and Intensive Bimanual Training on Spatiotemporal Characteristics of Bimanual Coordination and Motor Learning in Children with Unilateral Cerebral Palsy.
Article in medRxiv : the preprint server for health sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objectives: This study aimed to compare the effects of short versus intensive bimanual training on spatiotemporal features of bimanual coordination in children with unilateral cerebral palsy (UCP). Methods: In a prospective, repeated-measures design, 28 children with UCP completed two training regimens: a short dose (75 repetitions of speed stacking; ∼1-1.5 hours) and an intensive dose (30 hours of Hand arm bimanual intensive training). Bimanual learning was indexed by average time to complete nine stacking trials. Spatiotemporal kinematics were evaluated using three-dimensional motion analysis. For the bimanual coordination task, (3-2-1 stacking) outcomes included normalized movement overlap, total task duration, and participation time. For a symmetric bimanual task (simultaneous two-cup transfer), task synchronization and completion time were analyzed. Peak tangential velocity and hand trajectory were assessed across both tasks. General linear models with repeated measures were used to analyze the effects of training dose and extremity. Results: There was a significant main effect of training dose on movement time (p < 0.001), with both doses improving bimanual learning. The intensive dose yielded significantly greater gains in normalized movement overlap, total task duration, hand trajectory, and participation time (all p = 0.001) during the bimanual coordination task. A dose-by-extremity interaction was identified for peak tangential velocity (p = 0.03), demonstrating greater velocity gains in the more affected limb. In the symmetric task, a main effect of dose was found only for hand trajectory (p < 0.03). Conclusions: Both short and intensive bimanual training enhanced bimanual learning and coordination in children with UCP. While intensive training yielded greater improvements, even brief, ecologically valid tasks produced measurable gains, highlighting the importance of training intensity and task specificity in pediatric neurorehabilitation.
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