Maximal Fat Oxidation during Incremental Upper and Lower Body Exercise in Healthy Young Males

Mike Price (), Lindsay Bottoms, Matthew Hill and Roger Eston
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Mike Price: Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, Coventry CV1 5FB, UK
Lindsay Bottoms: Department of Psychology, Sport and Geography, University of Hertfordshire, Hatfield AL10 9AB, UK
Matthew Hill: Centre for Sport, Exercise and Life Sciences, School of Life Sciences, Coventry University, Coventry CV1 5FB, UK
Roger Eston: Alliance for Research in Exercise, Nutrition and Activity, Campus Central—City East, University of South Australia, GPO Box 2471, Adelaide 5001, Australia

IJERPH, 2022, vol. 19, issue 22, 1-13

Abstract: The aim of this study is to determine the magnitude of maximal fat oxidation (MFO) during incremental upper and lower body exercise. Thirteen non-specifically trained male participants (19.3 ± 0.5 y, 78.1 ± 9.1 kg body mass) volunteered for this repeated-measures study, which had received university ethics committee approval. Participants undertook two incremental arm crank (ACE) and cycle ergometry (CE) exercise tests to volitional exhaustion. The first test for each mode served as habituation. The second test was an individualised protocol, beginning at 40% of the peak power output (PO peak ) achieved in the first test, with increases of 10% PO peak until volitional exhaustion. Expired gases were recorded at the end of each incremental stage, from which fat and carbohydrate oxidation rates were calculated. MFO was taken as the greatest fat oxidation value during incremental exercise and expressed relative to peak oxygen uptake (% V ? O 2peak ). MFO was lower during ACE (0.44 ± 0.24 g·min ?1 ) than CE (0.77 ± 0.31 g·min ?1 ; respectively, p < 0.01) and occurred at a lower exercise intensity (53 ± 21 vs. 67 ± 18% V ? O 2peak ; respectively, p < 0.01). Inter-participant variability for MFO was greatest during ACE. These results suggest that weight loss programs involving the upper body should occur at lower exercise intensities than for the lower body.

Keywords: Fat max; carbohydrate oxidation; cycle ergometry; arm crank ergometry; variability (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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