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OpenCap - Musculoskeletal forces from smartphone videos. 
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Musculoskeletal forces from smartphone videoGet Started
Musculoskeletal forces from smartphone video
See example sports session
See example rehab session
How it works
Step 01
Get OpenCap's iOS app
Our iOS app allows you to collect synchronous videos on iPods, iPhones, and iPads.
Step 02
Use OpenCap's secure web app to collect data
Our web app allows you to record videos and visualize motion data.
Step 03
Leverage OpenCap's cloud servers to compute motion and forces
Our algorithms automatically compute skeletal motion and musculoskeletal forces.
Step 04
Use OpenCap's utilities to process data
Our utilities allow you to post-process and visualize your data.
Example applications
Walking
Sit-to-stand
Squats
Drop jumps
Treadmill Running
Jumping
Key features
01
Low-cost and easy to use
- No specialized hardware, software, or expertise required.
- Only need 2 iOS devices.
- Automated cloud computing.
02
Accurate motion and forces
- Skeletal motion from a constrained biomechanical model.
- Musculoskeletal forces from dynamic simulation.
- Validated against marker-based motion capture and force plates.
03
Fast and portable
- Setup in 5 minutes.
- Collect data anywhere with internet.
- Compute kinematics in minutes.
04
Secure
- Compliant with Stanford University High Risk Data Cloud computing requirements.
- All data are encrypted in transit and at rest.
- Leverages AWS HIPAA compliant cloud computing.
Want to learn more?
- View our manuscript
- Check out example sports and rehabilitation-related sessions
- Contact us
Team
Scott Uhlrich
,
PhD
Research Engineer at Stanford University
Antoine Falisse
,
PhD
Postdoctoral Fellow at Stanford University
Łukasz Kidziński
,
PhD
Research Engineer at Stanford University
Jennifer Hicks
,
PhD
Research Engineer at Stanford University
Scott Delp
,
PhD
Professor of bioengineering, mechanical engineering, and orthopaedic surgery at Stanford University
info
Contact
For technical questions, please use our forum.
Please consult our FAQ before asking questions.
There is NO need for verification code when installing the iOS web app, please visit Get Started and follow the two-step process.
We do NOT support Android, consult our FAQ to learn more.
Please consult our FAQ before asking questions.
There is NO need for verification code when installing the iOS web app, please visit Get Started and follow the two-step process.
We do NOT support Android, consult our FAQ to learn more.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
OpenCap is developed at Stanford University in the Neuromuscular Biomechanics Laboratory under the supervision of Prof. Scott Delp. The project is supported by the Wu Tsai Human Performance Alliance at Stanford University, the Mobilize Center, a Biomedical Technology Resource Center funded by the National Institutes of Health under Grand P41EB027060, and the Restore Center, a Medical Rehabilitation Research Resource Center funded by the National Institutes of Health through Grant P2CHD10191301.