title: Acute metabolic response to fasted and postprandial exercise.
abstract: The aim of this study was to analyze the acute metabolic response to exercise in fasting and postprandial. For this, ten individuals were submitted to an incremental treadmill test, with an initial speed of 5 and 1 km/h increments every minute, with no inclination, and a body composition assessment. After this 1st day, all volunteers were submitted to two experimental procedures (fasting and postprandial), with an aerobic exercise performed for 36 minutes at 65% of maximal oxygen consumption. At postprandial procedure, all subjects ingested a breakfast containing 59.3 g of carbohydrate (76.73%), 9.97 g of protein (12.90%), 8.01 g of lipids (10.37%), with a total energy intake of 349.17 kcal. An analysis of plasma concentration of triglycerides, lactate, and glucose was performed in two stages: before and after exercise. The Shapiro-Wilk test was used to verify the normality of the data. For analysis of glucose concentration, plasma lactate, and triglycerides, we used a repeated measures analysis of variance factorial 2×2, with Bonferroni multiple comparison test. The significance level of P<0.05 was adopted. The results indicated a maintenance level of glucose at fasting and a decrease in glucose concentration at postprandial exercise. Both conditions increase plasma lactate. Triglycerides also increased in the two experimental conditions; however, after exercise fasting, the increase was significantly higher than in the postprandial exercise. These data suggest that both exercises could increase plasma lactate and triglycerides. However, exercise performed in fasting condition decreases glucose concentration and increases triglycerides, even more than postprandial exercise.
authors: University of Brasília, Brasília, DF, Brazil ; Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Filipe Dinato
authors: FD
authors: de Lima
authors: University of Brasília, Brasília, DF, Brazil.
authors: Ana Luiza Matias
authors: AL
authors: Correia
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Denilson da Silva
authors: Dda S
authors: Teixeira
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Domingos Vasco
authors: DV
authors: da Silva Neto
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Ítalo Sávio Gonçalves
authors: ÍS
authors: Fernandes
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Mário Boratto Xavier
authors: MB
authors: Viana
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Mateus
authors: M
authors: Petitto
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Rodney Antônio
authors: RA
authors: da Silva Sampaio
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Sandro Nobre
authors: SN
authors: Chaves
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Simone Teixeira
authors: ST
authors: Alves
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Renata Aparecida Elias
authors: RA
authors: Dantas
authors: Universitary Center of Brasília (UniCEUB), Brasília, DF, Brazil.
authors: Márcio Rabelo
authors: MR
authors: Mota
keywords: aerobic exercise; blood glucose; energy metabolism; lactic acid; triglycerides