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Background and aims
The aim of this study was to evaluate changes in fat oxidation rate during 40 min of continuous exercise and identify the intensity at the highest fat oxidation rate (Fatmax).
Methods
A total of 14 sedentary males with age, body height, weight, and BMI averages of 29.3 ± 0.7 years, 178.3 ± 1.7 cm, 81.1 ± 3.9 kg, and 25.4 ± 0.9 kg/m2, respectively, were included in the study. Fatmax was determined using an indirect calorimeter with an incremental treadmill walking test at least after 12 h of fasting. On a separate day, at least after 12 h of fasting, the participants walked for 40 min within their predetermined individual Fatmax heart rate and speed ranges.
Results
The initial fat oxidation rate was not sustained within the first 16 min of exercise and was reduced; however, carbohydrate oxidation reached a stable level after nearly 10 min.
Conclusions
In sedentary individuals, during low-intensity physical activity, fat oxidation rates may not be sustainable as expected from Fatmax testing. Therefore, when exercise is prescribed, one should consider that the fat oxidation rate might decrease in sedentary overweight individuals.
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Editor-in-Chief
László ROSIVALL (Semmelweis University, Budapest, Hungary)
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Anna BERHIDI (Semmelweis University, Budapest, Hungary)
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- Gábor SZÉNÁSI (Semmelweis University, Budapest, Hungary)
- Ákos KOLLER (Semmelweis University, Budapest, Hungary)
- Zsolt RADÁK (University of Physical Education, Budapest, Hungary)
- László LÉNÁRD (University of Pécs, Hungary)
- Zoltán UNGVÁRI (Semmelweis University, Budapest, Hungary)
Assistant Editors
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- Zsuzsanna MIKLÓS (Semmelweis University, Budapest, Hungary)
- György NÁDASY (Semmelweis University, Budapest, Hungary)
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- Zoltán BENYÓ (Semmelweis University, Budapest, Hungary)
- Mihály BOROS (University of Szeged, Hungary)
- László CSERNOCH (University of Debrecen, Hungary)
- Magdolna DANK (Semmelweis University, Budapest, Hungary)
- László DÉTÁRI (Eötvös Loránd University, Budapest, Hungary)
- Zoltán GIRICZ (Semmelweis University, Budapest, Hungary and Pharmahungary Group, Szeged, Hungary)
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