I am currently investigating muscle activity during bicycle use.
As a problem, the results calculated by SO compared to actual EMG are different.
This is particularly noticeable in the gastrocnemius muscle, which is a bi-articular muscle near the knee joint. Floor reaction forces are given.
The images show the results of calculations in Opensim in the gastrocnemius and biceps femoris muscles at the same time (left) and the actual EMG (right). Thus, the error is greater in the gastrocnemius muscle.
Any advice on how to solve this problem?
![Image](%5Battachment=0%5Dimage.png%5B/attachment%5D)
Best regards.