MFO: Maximal Fat Oxidation and Kinetics Calculation

Computes the maximal fat oxidation (MFO), the exercise intensity that elicits it (Fatmax), the Fatmax zone and the crossover point from indirect calorimetry data of a graded exercise test. Substrate oxidation is estimated with the stoichiometric equations of Frayn (1983) <doi:10.1152/jappl.1983.55.2.628>, Peronnet and Massicotte (1991, Can J Sport Sci 16(1):23-29) or Jeukendrup and Wallis (2005) <doi:10.1055/s-2004-830512>, and Fatmax is located with a third- or second-degree polynomial, the measured values or the MRER method. Fat oxidation kinetics are described with the SIN model of Cheneviere et al. (2009) <doi:10.1249/MSS.0b013e31819e2f91>, which returns dilatation, symmetry and translation, together with the intensity at which fat oxidation becomes negligible (Fatmin). Applications of these methods are given in Achten et al. (2002) <doi:10.1097/00005768-200201000-00015> and Montes de Oca et al. (2021) <doi:10.1080/17461391.2020.1788650>.

Version: 0.2.1
Depends: R (≥ 4.1.0)
Imports: stats, dplyr, ggplot2, tibble, minpack.lm, openxlsx, readxl, tidyr
Suggests: covr, knitr, rmarkdown, testthat (≥ 3.0.0), withr
Published: 2026-11-12
DOI: 10.32614/CRAN.package.MFO
Author: Jorge R Fernandez-Santos ORCID iD [aut, cre], Jesus G Ponce-Gonzalez ORCID iD [ctb], Cristina Casals ORCID iD [ctb], Jose L Gonzalez-Montesinos ORCID iD [ctb], Juan Corral-Perez ORCID iD [ctb], Alejandro Perez-Bey ORCID iD [ctb]
Maintainer: Jorge R Fernandez-Santos <jorgedelrosario.fernandez at uca.es>
BugReports: https://github.com/JorgeDelro/MFO/issues
License: MIT + file LICENSE
URL: https://github.com/JorgeDelro/MFO, https://jorgedelro.github.io/MFO/
NeedsCompilation: no
Language: en-GB
Citation: MFO citation info
Materials: README, NEWS
CRAN checks: MFO results

Documentation:

Reference manual: MFO.html , MFO.pdf
Vignettes: From gas exchange to Fatmax (source, R code)

Downloads:

Package source: MFO_0.2.1.tar.gz
Windows binaries: r-devel: MFO_0.1.0.zip, r-release: MFO_0.1.0.zip, r-oldrel: MFO_0.1.0.zip
macOS binaries: r-release (arm64): MFO_0.1.0.tgz, r-oldrel (arm64): MFO_0.1.0.tgz, r-release (x86_64): MFO_0.1.0.tgz, r-oldrel (x86_64): MFO_0.1.0.tgz
Old sources: MFO archive

Linking:

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