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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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RELATIONSHIP BETWEEN TRAINING STATUS AND MAXIMAL FAT OXIDATION RATE |
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Adriano E. Lima-Silva1,2, Romulo C. M. Bertuzzi2, Flavio O. Pires2, Joao F. L. Gagliardi2, Ronaldo V. Barros2, John Hammond3 and Maria A. P. D. M. Kiss2 |
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1Sports Science Research Group, Federal University of Alagoas, Brazil, 2Department of Sport, School of Physical Education and Sport, São Paulo University, Brazil, 3Department of Sport, Coaching and Exercise Science, University of Lincoln, UK. |
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© Journal of Sports Science and Medicine (2010) 9, 31 - 35 |
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| ABSTRACT | |||
| This study aimed to compare maximal fat oxidation rate parameters
between moderate- and low-performance runners. Eighteen runners performed
an incremental treadmill test to estimate individual maximal fat oxidation
rate (Fatmax) based on gases measures and a 10,000-m run on a track. The
subjects were then divided into a low and moderate performance group using
two different criteria: 10,000-m time and VO2max values. When
groups were divided using 10,000-m time, there was no significant difference
in Fatmax (0.41 ± 0.16 and 0.27 ± 0.12 g.min-1, p = 0.07) or
in the exercise intensity that elicited Fatmax (59.9 ± 16.5 and 68.7 ± 10.3
% O2max, p = 0.23) between the moderate and low performance groups,
respectively (p > 0.05). When groups were divided using VO2max
values, Fatmax was significantly lower in the low VO2max group
than in the high VO2max group (0. 29 ± 0.10 and 0.47 ± 0.17 g.min-1,
respectively, p < 0.05) but the intensity that elicited Fatmax did not
differ between groups (64.4 ± 14.9 and 61.6 ± 15.4 %VO2max).
Fatmax or %VO2max that elicited Fatmax was not associated with
10,000 m time. The only variable associated with 10,000-m running performance
was %VO2max used during the run (p < 0.01). In conclusion,
the criteria used for the division of groups according to training status
might influence the identification of differences in Fatmax or in the intensity
that elicits Fatmax. Key words: fat oxidation; running performance; indirect calorimetry. |
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