Specifications

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up to an almost vertical position. If you plot the muscle force, Fm, again in a chart view, then you can see
how the muscle force goes up drastically with the reduced moment arm:
Consequently the muscle now bulges more towards the end of the movement than it does in the beginning:
The muscle thickness does not have to reflect force. Choosing other values for the Bulging property will give
other results:
Bulging value Effect Comment
0 No bulging This is the default value
1 Muscle force Thickness is proportional to force
2 Muscle strength Constant in this case (but relevant for more advanced muscle models)
3 Muscle activity The ratio between muscle force and muscle strength
4 Constant volume The muscle gets thicker when it contracts
Muscle state can also be visualized with color. This allows for using bulging to visualize the force, while, for
instance, muscle activity can be visualized with color. Try the following: