Hello Omar

to calculate of moment of inertia, you must use the body segment parameter (BSP). you can read winter's book (Chapter 4-Anthropometry). practically follow the below steps for:

1- requirement (kinematic data, body mass)

2- calculate mass of segment you want (for example Thigh)

3- calculate radius of gyration

4- calculate moment of inertia about axis of proximal, distal and COM (Equation (Ix proximal=x proximal+ Coefficient of Com proximal*(X distal-x proximal).

5- calculate moment of inertia base on Parallel axis theorem

Hossein Nabavinik Marco Povolo thanks for explanation and response , i really appreciate to get these information..

https://www.jospt.org › doi › abs › jospt.2018.7634 › code=jospt-site

Omar Sabah Al-Dahiree did you find anything about the damping coefficient of the hip joint? I'm really interested in this topic too.

José Luis Sarmiento , sorry for late response,

however, after long search regarding to calculate moment of inertia of the hip joint, I have seen many works had been adopted the estimation calculation base on the anthropocentric information presented in the table in (Winter, 2009) and you can follow the same steps that Hossein Nabavinik mentioned above and you can get the estimation value of moment of inertia for the hip joint.

furthermore, you can also estimation value for the damping coefficient which has been experimented in some articles and it can give you the approximate value.

please check these articles

Article Analysis of squat and stoop dynamic liftings: Muscle forces ...

Article Mechanical behaviour of hamstring muscles in low-back pain p...

Article A new method for the simultaneous measurement of the moment ...

Omar Sabah Al-Dahiree thank you very much!