Experimental data for the first competition. The zip files below contain three categories of data: raw unprocessed data (c3d files, video files, and trial notes), processed/filtered data (motion, ground reaction force, and EMG data), and OpenSim models. Under Documentation Links, the file "Competition Data Description.pdf" provides the competition logistics, subject information for this year's competition, a detailed description of the data and models provided, and instructions for competitors on how to evaluate their predictions. The file "Competition Workshop Presentation.pdf" is the presentation delivered at the ASB 2023 workshop and provides an introduction to the Stroke Grand Challenge Competition, the Model Personalization and Treatment Optimization tools, and walks users through hands-on tutorials.