I am a PhD student in ergonomics conducting research on lower limb biomechanics in real-world work environments. I am using a motion capture system and lower limb EMG to collect data during standing work tasks, where the use of force plates is not feasible.
My objective is to analyze the biomechanics of the lower limbs with and without an exoskeleton using OpenSim. However, I am unsure if performing inverse dynamics analysis is possible without force plate data.
Thank you in advance
Greetings, Catarina. Unfortunately, it doesn't seem feasible to accomplish what you're suggesting without first inputting force plate information to obtain muscle forces and joint moments. Since OpenSim doesn't allow for contact between the foot and the ground, the force plate must be taken into consideration. In my opinion, it would be more effective to use the speed of walking to define GRF. Use the below paper:
Nilsson J, Thorstensson A. Ground reaction forces at different speeds of human walking and running. Acta Physiol Scand. 1989 Jun;136(2):217-27. doi: 10.1111/j.1748-1716.1989.tb08655.x. PMID: 2782094.
I think Yes it is possible but with the use if EMG as an alternative.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5550294/
I greatly appreciate your suggestion Sohrab Niknezhad Your input is truly valued. However, since I'm collecting data from surgeons who spend prolonged periods in static standing positions during procedures, those methods may not be applicable. I have come across some literature about EMG but they primarily focus on walking tasks rather than the static standing conditions (Example: https://simtk-confluence.stanford.edu:8443/display/OpenSim/Predicting+Ground+Reaction+Forces+with+EMG+Data%3A+a+Neural+Network+Approach)
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