University of Northern Colorado 1 article published in JoVE Bioengineering Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis Jeremy D. Smith1, Abbie E. Ferris1, Gary D. Heise1, Richard N. Hinrichs2, Philip E. Martin3 1School of Sport & Exercise Science, University of Northern Colorado, 2Kinesiology Program, Arizona State University, 3Department of Kinesiology, Iowa State University Body segmental inertial properties are required for inverse dynamics modeling. Using an oscillation and reaction board technique, inertial properties of below-knee prostheses were measured. Using direct measures of prosthesis inertia in the inverse dynamics model of the prosthetic leg resulted in lower magnitudes of resultant joint forces and moments.