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The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

For a seated person the CoG is shifted forwards and up of navel, total distance and angle will very according to the specifics of the posture: https://www.researchgate.net/figure/Center-of-gravity-of-a-person-in-sitting-posture-Body-segmental-Lengths-are-reported-in_fig2_256203106

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):

The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

For a seated person the CoG is shifted forwards and up of navel, total distance and angle will vary according to the specifics of the posture: https://www.researchgate.net/figure/Center-of-gravity-of-a-person-in-sitting-posture-Body-segmental-Lengths-are-reported-in_fig2_256203106

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):

The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):

The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

For a seated person the CoG is shifted forwards and up of navel, total distance and angle will very according to the specifics of the posture: https://www.researchgate.net/figure/Center-of-gravity-of-a-person-in-sitting-posture-Body-segmental-Lengths-are-reported-in_fig2_256203106

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):

The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):

The center of gravity of a standing human body is roughly about an inch below navel: https://www.sciencedirect.com/topics/physics-and-astronomy/center-of-gravity

The antrophomorphic test dummies mimic the proportions, weight distribution and kinematics of a human body as close as possible, for obvious reasons: to accurately replicate the response of a human body to forces, the ATD must resemble it accurately, not just as a whole, but down to its individual part also.

Example information of THOR ADT: Anthropomorphic Test Devices; THOR 50th Percentile Adult Male Test Dummy; Incorporation by Reference

If you wish to build a more accurate model, here is an example of a further break-down of proportional masses of average human body parts (Source):