The reliability of fat

The exercise intensity eliciting maximal fat oxidation (Fat(max)) is typically determined during an incremental test. Its reproducibility, however, has not been thoroughly investigated so far. To address this issue, 21 healthy subjects (23.5+/-1.7 years; BMI 22.4+/-1.8 kg/m(2); VO(2peak) 47.4+/-11.3...

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Bibliographic Details
Published in:Scandinavian journal of medicine & science in sports 2009-04, Vol.19 (2), p.213
Main Authors: Meyer, T, Folz, C, Rosenberger, F, Kindermann, W
Format: Article
Language:English
Subjects:
Adipose Tissue - metabolism
Adult
Body Composition - physiology
Body Mass Index
Calorimetry
Exercise - physiology
Female
Germany
Humans
Male
Oxidation-Reduction
Oxygen Consumption - physiology
Reproducibility of Results
Young Adult
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Summary:The exercise intensity eliciting maximal fat oxidation (Fat(max)) is typically determined during an incremental test. Its reproducibility, however, has not been thoroughly investigated so far. To address this issue, 21 healthy subjects (23.5+/-1.7 years; BMI 22.4+/-1.8 kg/m(2); VO(2peak) 47.4+/-11.3 mL/min/kg) carried out two identical cycling tests to determine Fat(max) after an initial incremental baseline test. The duration of each of five stages during the Fat(max) tests was 6 min. The first stage equalled the first increase in blood lactate during the baseline test; the highest stage corresponded to a respiratory exchange ratio of 1.00. Between these intensities the other three stages were distributed evenly. Fat(max) was 28.0+/-8.6 L/min (59.2+/-18.1% VO(2peak)) in the first test and 29.8+/-10.5 L/min (62.9+/-22.2% VO(2peak)) in the second one. There was no significant difference between both Fat(max) determinations [number of stage: P=0.31; total VO(2): P=0.20; VO(2) utilized for fat oxidation (VO(2Fat)): P=0.33]. Linear correlation coefficients between tests were r=0.84 (total VO(2); P
ISSN:1600-0838
DOI:10.1111/j.1600-0838.2008.00775.x