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Douglas Blanton
02-07-2004, 07:19 AM
Does anyone know of previous work about changes in body segment parameters
(including center of mass) assoicated with obesity?
This will be used as part of a study showing the relationship between body
stresses
and obesity.

I have decided to investigate this area in particular. The previous general
request for information resulted in some good information and it has been
inclosed at the bottom.

Thanks for the help!

Regards,

Douglas Blanton
University of Cincinnati



Several predictive models for Body Segments Parameters (BSP) take into
account the "global shape" of the human body by means of specific
measurements of the segments : Hanavan models -1964-, Hatze -1980-,
Zatsiorsky et al. -1990- ...

This paper might help a bit. It examines the amount of error present in
using a few of the models that are currently available in the literature.
The subjects who participated had a wide range of body sizes and varied by
age and gender as well. My research has involved measuring body segment
parameters from people directly using dual energy x-ray absorptiometry
(DEXA). This method has yielded errors of less than 3% and has allowed me to
examine the error involved in using specific models available in the
literature. I have also developed regression equations (attached paper) as
well as geometric models (in review) but a complete set for the entire human
body is not yet available. As far as current models go, the regression
equations of Zatsiorsky et al. (1990) have provided the most consistently
accurate BSP estimations. Hope this helps.

Zatsiorsky et al. (1990). Methods of determining mass-inertial
characteristics of human body segments. In Chernyi,G.G.& Regirer,S.A.
Contemporary Problems of Biomechanics. CRC Press:Boston, pp. 272-291.


You should check on papers by a Robert Jensen ranging from 1978 to present.
He has some work on pregnant women, elderly people etc. His work uses a
stereophotogrammetic method that is individulalized. He also has a good
review article I htink about that very topic. That and you might try Hay,
circa 1973 or 74.


Durkin, J.L. (2003). Development of a Geometric Modelling Approach for Human
Body Segment Inertial Parameter Estimation. PhD Dissertation. McMaster
University, Hamilton, ON.


Did you look at the book enitled Kinetics of Human Motion by V. Zatsiorsky?
There is some information there on the % changes of the BSPs with the body
size.


Durkin, J. L. and J. J. Dowling (2003). "Analysis of body segment parameter
differences between four human populations and the estimation errors of four
popular mathematical models." Journal of Biomechanical Engineering 125(4):
515-522.

Durkin, J. L., J. J. Dowling, et al. (2002). "The measurement of body
segment inertial parameters using dual-energy X-ray absorptiometry." Journal
of Biomechanics 35(12): 1575-1580.

Ganley, K. J. and C. M. Powers (In Press). "Determination of lower extremity
antrhopometric parameters using dual energy x-ray absorptiometry: the
influence on net joint moments during gait." Clinical Biomechanics.

Jensen, R. K. (1989). "Changes in segment inertia proportions between 4 and
20 years." Journal of Biomechanics 22(6-7): 529-536.

Pearsall, D. J., J. G. Reid, et al. (1994). "Inertial properties of the
human trunk of males determined from magnetic resonance imaging." Annals of
Biomedical Engineering 22(6): 692-706.


Jensen, R.K. (1978) Estimation of the biomechanical properties of three body
types using a photogrammetric method. Journal of Biomechanics vol. 11, pages
349-358.

However, this data is from 8 to 11 year old boys, which may or may not be
the best sample population for you. It's also only an n=3 sample size (one
endomorph, one ectomorph, and one mesomorph). I'd be interested if you find
other data!


We have published recently an article entitled
Farenc I, Rougier P, Berger L.
The influence of gender and body characteristics on upright stance.
Ann Hum Biol. 2003; 30(3): 279-94.

Its abstract:
BACKGROUND: Morphologic characteristics such as height and body weight
determine body inertia, an important factor related to
postural stability. However, whilst investigations have classically analysed
these parameters separately, global morphology has been
poorly researched. Secondly, the influence of gender on postural stability
demonstrates opposing trends, some authors observing that
men sway less than women, and others noting the contrary. AIM: The aims of
this study are to evaluate morphology and gender effects
on healthy subjects during postural maintenance. Subjects and methods: The
studied subjects were categorized through the Livi index.
A method associating frequential and Brownian parameters characterized the
horizontal displacements of the centre of gravity (CG(h))
and those of the difference between the centre of pressure (CP) and the
vertical projection of the centre of gravity (CP-CG(v))
separately. Moreover, the moments of body inertia (MI) and natural body
frequency (NBF) were also used to determine the influence
of morphology. RESULTS AND CONCLUSIONS: The results reveal that thinner
subjects have larger CG(h) displacements than
normal or corpulent subjects. Morphologic characteristics (NBF) can explain
these behavioural differences. On the other hand, men
have a larger sway amplitude for CG(h) motions than women. This can be
explained by both morphologic (MI, NBF) and
physiological (architectural properties of the soleus muscle)
characteristics.


Pearsall, D.J., and Costigan, P.A. The effect of segment parameter error on
gait analysis results. Gait and Posture 9, 173-183. 1999.

it have great references especially those of Myers, M. et al. and Pate RR et
al.

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