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Correction to: A mathematical model of the effects of resistance exercise-induced muscle hypertrophy on body composition
Correction to:
European Journal of Applied Physiology
Correction to: A mathematical model of the effects of resistance exercise-induced muscle hypertrophy on body composition
Marcella Torres 0 1
Eric T. Trexler 0 1
Abbie E. Smith‑Ryan 0 1
Angela Reynolds 0 1
Corrected Eq. 0 1
Marcella Torres 0 1
0 Department of Exercise and Sport Science, University of North Carolina Chapel Hill , 209 Fetzer Hall, Chapel Hill, NC 27599 , USA
1 Department of Mathematics and Applied Mathematics, Virginia Commonwealth University , 1015 Floyd Ave, Richmond, VA 23284 , USA
There is a typo in the original equation describing lean mass, and it has also been pointed out to the authors that the model is not strictly energy balanced. This corrigendum aims to correct these issues by clarifying Eq. 8 in the original manuscript, stating that the model is not energy balanced and describing how the model could be energy balanced and how the results would change only marginally.
-
dL = p EI − EE − G dt
dG
dt
+ r
L
L + H1 1 +
1
L
H2
L + r
L
L + H1 1 +
1
L
H2
The Torres et al. model is not energy balanced because
the right hand sides of the equations describing energy
dF = (1 − p) EI − EE − G dt
dG
dt
dL = p EI − EE − G dt
dG
dt
F −
r L L
F L + H1 1 +
L + r
L
L + H1 1 +
1
(2)
the model can be made energy balanced. Adding this term
makes the simplifying biological assumption that the gain in
lean mass corresponds to a loss in adipose tissue to achieve
energy balance. We acknowledge that this process is
significantly more complicated and that stored adipose tissue is not
used to generate lean tissue. Future models can be developed
to more accurately model this process.
Changing this term would result primarily in a slight
decrease in predicted fat mass levels over time with
insignificant changes in predicted lean mass levels. Since the
main analyses included in the original manuscript are based
on the lean mass results, the results and conclusions of the
manuscript are unchanged when the model is replaced with
an energy balanced model.
age US male aged 20–39 years from NHANES 1999–2004
(Borrud
et al. 2010)
. B Predicted FM is compared for the same conditions as
in A. C Predicted LM in response to RE for the average US male on a
maintenance energy intake (shown in A). D Predicted LM in response
to RE for an average US female aged 20–39 years from NHANES
1999–2004
(Borrud et al. 2010)
LM with SEM for 29 elderly men. B Predicted and measured average
FM with SEM for 29 elderly men. C Predicted and measured average
LM with SEM for 24 elderly women. D Predicted and measured
average FM with SEM for 24 elderly women
The following two figures show typical differences in
results between the model of Torres et al. and the energy
balanced model under different initial conditions.
Page 452: Fig. 3.
Page 457: Fig. 9.
Borrud L , Flegal K , Looker A , Everhart J , Harris T , Shepherd J ( 2010 ) Body composition data for individuals 8 years of age and older: (...truncated)