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  • Full-Featured and Flexible Modeling Platform. OpenSim allows you to build models of a broad range of musculoskeletal structures and many other mechanisms. Models can include any combination of rigid bodies, simple and complex joints, constraints, springs, dampers, contact, controllers, muscles, and other actuators.  The graphical user interface (GUI) allows you to load and visualize your models, and edit any of their properties.

  • Muscle Models. OpenSim’s Hill-type muscle models capture the active and passive force generating properties of muscles and are based on well-tested models of muscle-tendon dynamics from the literature.

  • Musculoskeletal Model Library. OpenSim ships with a set of extensively validated musculoskeletal models of the upper and lower extremities. In addition to research-grade models, there are simplified models for prototyping and teaching. Our online model library includes user-contributed models.