Energy system contribution in a maximal incremental test: correlations
with pacing and overall performance in a 10-km running trial |
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| Authors: | MV Damasceno LA Pasqua AE Lima-Silva R Bertuzzi |
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| Institution: | 1.Grupo de Estudos em Desempenho Aeróbio da USP (GEDAE-USP), Departamento de Esporte, Escola de Educação Física e Esporte, Universidade de São Paulo, São Paulo, SP, Brasil;2.Grupo de Pesquisa sobre Ciência dos Esportes, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Vitória de Santo Antão, PE, Brasil |
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| Abstract: | This study aimed to verify the association between the contribution of energy systems
during an incremental exercise test (IET), pacing, and performance during a 10-km
running time trial. Thirteen male recreational runners completed an incremental
exercise test on a treadmill to determine the respiratory compensation point (RCP),
maximal oxygen uptake (), peak treadmill speed (PTS), and energy systems contribution; and
a 10-km running time trial (T10-km) to determine endurance performance. The fractions
of the aerobic (WAER) and glycolytic (WGLYCOL) contributions
were calculated for each stage based on the oxygen uptake and the oxygen energy
equivalents derived by blood lactate accumulation, respectively. Total metabolic
demand (WTOTAL) was the sum of these two energy systems. Endurance
performance during the T10-km was moderately correlated with RCP, and PTS (P<@0.05), and moderate-to-highly correlated with
WAER, WGLYCOL, and WTOTAL (P<0.05). In
addition, WAER, WGLYCOL, and WTOTAL were also
significantly correlated with running speed in the middle (P<0.01) and final
(P<0.01) sections of the T10-km. These findings suggest that the assessment of
energy contribution during IET is potentially useful as an alternative variable in
the evaluation of endurance runners, especially because of its relationship with
specific parts of a long-distance race. |
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| Keywords: | Aerobic metabolism Running Maximal oxygen uptake Anaerobic metabolism Endurance performance |
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