Impact of Gravity on standing model?

Main Forum
1

Hello AnyScript community,

I have a question on how the gravity works on a standing model. Does ist just apply in the Body Center or does it have an impact on every single part of the body?

In detail:
If a person is standing with straightened arm in front of the body, is there muscle activation in the shoulder-girdle due to the weight of forearm, hand et cetera?

Thanks in advance
Chris

2

Hi Chris,

Gravity applies onto each individual segment’s center of mass, not the center of mass of whole body.

There is an good example for you in the repository:
‘…\AMMR\Application\Validation\BergmannGH’

In this model human moves a dumbbell with his arm.
When you run the inverse dynamics analysis of this model then you can see some changes of muscle activation around the shoulder joint.

Best regards,
Moonki

3

Thank you very much for your quick response.

That helps me a lot with my problem.

Kind regards,
Chris