Carbohydrate and fatty acid metabolism responses to a graded maximal exercise test and recovery period in athletes and sedentary subjects

Autor: D. Zikic, M. Sumarac-Dumanovic, Marina Djelic, Sanja Mazic, Dragan Micic, Biljana Lazovic
Rok vydání: 2015
Předmět:
Zdroj: Science & Sports. 30:321-327
ISSN: 0765-1597
DOI: 10.1016/j.scispo.2015.02.011
Popis: Summary Objective Was to investigate glucose and free fatty acid (FFA) responses to a graded maximal exercise test and recovery period in athletes and sedentary subjects. Subjects and methods Twelve trained man (TG) and twelve untrained men (UTG) performed an incremental maximal treadmill test. Blood samples were taken from all subjects in the morning before, at the end of the test and after 30 minutes of recovery. Insulin, glucose and FFA levels were determined at these points in time. Results Glucose concentration did not differ between TG and UTG at rest. Glucose levels increased steadily during exercise in both groups, but this increase was significant only in UTG at the end of the exercise test (+18.71%; P P P P P P > 0.05) during exercise and recovery period. Insulin concentration significantly increased during exercise in both groups (+23.89% in TG and +47.64% in UTG, P P Conclusion The data presented indicate that chronic physical training markedly influences serum FFA profile in trained group. Our findings also indicate that metabolic response to one bout of maximal-intensity exercise test depends on training status of the subjects and that trained subjects (athletes) could have higher substrate flexibility under high energy demand.
Databáze: OpenAIRE
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