Get involved in our efforts to advance rehabilitation science by downloading OpenSim. Since OpenSim was made available to the public in 2007, thousands of students and researchers have used it to perform biomechanical studies. Explore how it can enhance your research and participate in our community, learning from others and sharing your own knowledge.


1. Register with

Your first step is to register on OpenSim projects live here, and once registered you will be connected to thousands of like-minded engineers, scientists, and physicians.

2. Download OpenSim.

Next, download the OpenSim software by visiting the OpenSim downloads page.  An executable version that can be downloaded and quickly installed is available for Windows.  Application program interface (API) versions are available for developers on Windows, MacOS, and Linux.

3. Do the tutorials.

The fastest way to learn OpenSim is by going through the tutorials available on the OpenSim Examples Page:

Tutorial 1:  Introduction to Musculoskeletal Modeling

Tutorial 2:  Simulation and Analysis of a Tendon Transfer Surgery

Tutorial 3:  Scaling, Inverse Kinematics, and Inverse Dynamics

You'll also find a user guide, a developer’s guide, and many other resources for becoming familiar with OpenSim.

4. Deepen your knowledge.

Check out our Support page for information and materials to further advance your use of OpenSim, including:

  • New tutorials and examples
  • Additional models and simulation data
  • A list of upcoming events, including webinars and workshops

5. Join the conversation.

Share your ideas and get answers to your questions through the OpenSim discussion forums.

Create your own project on to easily share your research results.  This lets others build upon your work.  It’s good for the entire field, and for you personally, it can lead to more citations and collaborations!

You can find more information about creating and managing projects on in the site's Simtk user guide.

Make sure you get the latest news about NCSRR and related projects by signing up for the email newsletter.

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News & Announcements

Vote for OpenSim in the NIH Video Competition!

Apr 28, 2014

You can help us win the NIH Song and Video Competition. Just watch and Click Like for the OpenSim video. The deadline is May 9th. We are excited to be competing with this video in the NIH Common Fund Song and Video Competition. The top 4 or 5 videos with the most "Likes" on YouTube will be shown during the Common Fund 10-Year Commemoration Symposium this June. We'd also appreciate you sharing with other (including colleagues, friends, and family!).

Dynamic Walker Challenge Winners Announced

Apr 24, 2014

Thanks to all participants and congratulations to the winners of the Dynamic Walker Competition: Geena Doak, Matthew Handford, and Alex MacIntosh. They each created dynamic walkers to traverse a complex terrain in OpenSim. See their videos on the OpenSim YouTube page.

OpenSim-based Science Fair Project Wins First Place

Feb 26, 2014

Florida high school students Christopher Fregly and Brandon Kim took first place in the Physics and Astronomy category at the Alachua Regional Science Fair. Working with NASA, Fregly and Kim used the OpenSim software to predict simple ways that astronauts could modify the standard squat exercise to be more effective at maintaining muscle mass on the International Space Station. They will be going on to compete in the Florida State Science Fair in April and in the prestigious Intel International Science and Engineering Fair in May. Read more here

Apply for the 2014 Visiting Scholars Program

Dec 18, 2013

Applications for the NCSRR's Visiting Scholar program are now available.