Methodology and limitations

Healthy reference replay

Dataset/trial: OpenSim Core test resources, subject01 walking reference; precomputed inverse-kinematics coordinates, Static Optimization activations, and forces. The page repeats one documented gait cycle to show ten alternating contacts.

Model estimate: Static Optimization estimates one possible distribution of muscle forces subject to model structure, geometry, loads, muscle parameters, and optimization assumptions. It does not directly measure individual muscle force.

Available: timestamps, binary contacts, selected IK coordinates, activations and model-estimated forces. Unavailable: original GRF/CoP/load/pressure time series, solver reserves/residuals, subject-matched reference ranges, independent-step variability, and patient results.

Anatomy view: simplified 2D research visualization; color is activation, numerical values are force estimates in N. It is not a deformation-validated anatomical simulation.

Sources

OpenSim · local reference files: walk_ik.mot, walk_force.sto, walk_activation.sto. Original legacy geometry attribution remains available in the repository.