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Related Experiment Video

Updated: Jul 7, 2026

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Published on: September 7, 2018

The reliability of fat.

T Meyer¹, C Folz, F Rosenberger

¹Institute of Sports and Preventive Medicine, University of Saarland, Saarbrücken, Germany. tim.meyer@uni-paderborn.de

Scandinavian Journal of Medicine & Science in Sports

|February 20, 2008

Summary

This summary is machine-generated.

Maximal fat oxidation (Fat(max)) determination lacks reproducibility for training prescription. Intraindividual variability is too large, suggesting this parameter is unreliable for guiding exercise intensity.

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Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans

Published on: June 4, 2014

Area of Science:

Exercise Physiology
Metabolic Research
Sports Science

Background:

Maximal fat oxidation (Fat(max)) is a key parameter for optimizing exercise intensity for fat metabolism.
Incremental exercise tests are commonly used to determine Fat(max).
The reproducibility of Fat(max) measurements has not been sufficiently investigated.

Purpose of the Study:

To assess the reproducibility of determining maximal fat oxidation (Fat(max)) during incremental exercise.
To evaluate the intraindividual variability of Fat(max) in healthy subjects.
To determine if Fat(max) is a reliable parameter for prescribing training intensity.

Main Methods:

Twenty-one healthy participants completed two identical incremental cycling tests to determine Fat(max).
Tests involved five 6-minute stages, with intensity based on blood lactate and respiratory exchange ratio.
Measurements included oxygen consumption (VO(2)) and fat oxidation rates (VO(2Fat)).

Main Results:

No significant differences were found between the two Fat(max) determinations (P > 0.20).
Strong linear correlations were observed between tests for total VO(2) (r=0.84) and VO(2Fat) (r=0.83).
However, Bland-Altman analysis revealed wide 95% limits of agreement, indicating substantial intraindividual variability.

Conclusions:

Spontaneous intraindividual variability in Fat(max) is considerable.
The current methods for determining Fat(max) show insufficient reproducibility.
Fat(max) is not recommended for the prescription of training intensity due to its variability.