Hello
Please I'm trying to do a biomechanical analysis of the biceps brachii when a mass of 4kg and 12kg dumbbell is added during the dumbbell curl exercises.
Upon adding the mass, I realized that the fibre force doesn't change after simulation.
Mass was added to the radius_ulna_hand body to reflect the weight of the dumbbell before simulation by changing the mass of the body from 1.5kg to 5.5kg, the same method was used to add a mass of 12kg which changed the new mass to 13.5kg
After performing inverse kinematics with the new mass, the fibre forces doesn't change
I'll like to enquire if there's a better way to add mass in such a way that it reflects on the fibre force after simulation and inverse kinematics is carried out.
Thank you for your time.
Adding Mass to a body doesn't affect the fibre force after simulation of the arm26 model
- Chiedozie Okefienam
- Posts: 1
- Joined: Tue Oct 03, 2023 1:31 am
- Mohammadreza Rezaie
- Posts: 390
- Joined: Fri Nov 24, 2017 12:48 am
Re: Adding Mass to a body doesn't affect the fibre force after simulation of the arm26 model
Hi, Inverse Kinematics (IK) tool only computes joints angles. I suspect that you are observing muscles forces via Plotter tool. Segments masses don't have any effect on IK and Plotter/Y-Quantity/*fiber-force results. You may want to use Static Optimization or Computed Muscle Control (CMC) tools to compute muscles forces.After performing inverse kinematics with the new mass, the fibre forces doesn't change
Some examples can be found here: https://simtk-confluence.stanford.edu:8 ... +Tutorials
Hope this helps.