[Kneeloads-news] Fourth Grand Challenge Competition Data Released

[Allison Hall]

Dear Musculoskeletal Modeling Research Community,



We would like to inform you that the data for the Fourth Grand Challenge
Competition to Predict In Vivo Knee Loads has now been posted on the
Simtk.org website (https://simtk.org/home/kneeloads). We apologize that we
were unable to post the competition data sooner, but bugs in the Vicon
Nexus software prevented us from completing the data processing as quickly
as we had anticipated. The competition will be held at the 2013 ASME Summer
Bioengineering Conference in Sunriver, Oregon (
http://www.asmeconferences.org/SBC2013/).



The goal of the Grand Challenge Competition is to advance the field of
musculoskeletal modeling by quantitative evaluation of model-based
estimates of muscle and contact force in the knee during gait by using in
vivo tibial contact force data collected from subjects implanted with
force-measuring knee replacements. An overview of the competition data,
including the two gait cycles to be used for the fourth competition, is
contained in the file “Competition Data Description.pdf.” The data for this
year’s competition includes subject-specific geometric bone models that
span from the pelvis to the toes. Motion capture, ground reaction, EMG, and
tibial contact force data were collected while the subject performed
overground and treadmill walking under a wide variety of conditions. CT,
strength, and fluoroscopic data were also collected and will be released at
a later date. A subject-specific OpenSim model is currently in development
and will be released in approximately 2-3 weeks.



Competitors who wish to participate in the Grand Challenge Competition need
to submit an abstract to the 2013 ASME Summer Bioengineering Conference by
January 11th, 2013. Competitors will also submit their predicted medial and
lateral tibial contact forces for the specified gait trials. The contact
force predictions will be submitted by email to Allison Hall (
allisonlhall at ufl.edu) by February 4th, 2013.



The research team encourages others to use the data and models from all
four Grand Challenge Competitions for their own research, publications, and
grant proposals. If you use any competition data or models in any
publications, please cite the following journal article:



Fregly, B.J., Besier, T.F., Lloyd, D.G., Delp, S.L., Banks, S.A., Pandy,
M.G., and D'Lima, D.D. (2012) Grand challenge competition to predict in
vivo knee loads. Journal of Orthopaedic Research 30(4):503-513.



We hope to see broad participation from the musculoskeletal modeling
research community for this year’s competition. Please post any questions
you have about the competition on the Public Forum of the Simtk.org
competition website.



Best regards,



Allison Hall, University of Florida

Darryl D’Lima, Shiley Center at Scripps Clinic

Thor Besier, University of Auckland

B.J. Fregly, University of Florida
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