the knee reaction force during squat

Linjie Wang · Post by **Linjie Wang** » Wed May 09, 2018 6:07 am

Hi, there.

Can I ask if someone tested the human knee reacion force during squat or ever used he data from Grand Challenge Competition to Predict In Vivo Knee Loads? I want to use experiment data to compare with my FEA analysis result, but found the data (screenshot below) from Grand Challenge Competition is far smaller than my result. After my further analysis, the ankle joint load (from OpenSim joint reaction analysis) I applied is already 3 times the Ground Reaction Force (around 300N), but the load extracted from the instrumented knee of Grand Challenge Competition is 400N in the beginning (the subject weight is around 70Kg) and no more than 2BW at the end of squat motion. Some literatures said the knee joint would bear a load between 3 and 5BW, so I am wondering if the experiment data I extracted was wrong or the equation for extracting the experiment data was wrong.

Thanks in advance,
Linjie