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Effect of pre-exercise carbohydrate availability on fat oxidation and energy expenditure after a high-intensity exercise BJMBR
Ferreira,G.A.; Felippe,L.C.; Silva,R.L.S.; Bertuzzi,R.; De Oliveira,F.R.; Pires,F.O.; Lima-Silva,A.E..
The aim of this study was to test the hypothesis that reduced pre-exercise carbohydrate (CHO) availability potentiates fat oxidation after an exhaustive high-intensity exercise bout. Eight physically active men underwent a high-intensity exercise (∼95% V̇O2max) until exhaustion under low or high pre-exercise CHO availability. The protocol to manipulate pre-exercise CHO availability consisted of a 90-min cycling bout at ∼70% V̇O2max + 6 × 1-min at 125% V̇O2max with 1-min rest, followed by 48 h under a low- (10% CHO, low-CHO availability) or high-CHO diet (80% CHO, high-CHO availability). Time to exhaustion was shorter and energy expenditure (EE) lower during the high-intensity exercise in low- compared to high-CHO availability (8.6±0.8 and 11.4±1.6 min, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Excess post-exercise oxygen consumption; Fat oxidation; Carbohydrate oxidation; Diet manipulation; Aerobic metabolism.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000500617
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Energy system contribution in a maximal incremental test: correlations with pacing and overall performance in a 10-km running trial BJMBR
Damasceno,M.V.; Pasqua,L.A.; Lima-Silva,A.E.; Bertuzzi,R..
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 ( V ˙ O 2 max), 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)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerobic metabolism; Running; Maximal oxygen uptake; Anaerobic metabolism; Endurance performance.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001101048
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