Luiz A. da Silva*, Jessica Wouk, Vinicius M. R. Weber, Pablo de Almeida, Julio C. L. Martins, Carlos R. M. Malfatti and Raul Osiecki Pages 621 - 626 ( 6 )
Introduction: Lactate Minimum Test (LMT) identifies a sustainable exercise intensity, in which an equilibrium is observed between production and clearance of blood lactate and the hormone influence during this physiological moment.Objective: The present study aimed to identify the levels of LM and hormones after caffeine consumption and exercise Stress Test (ST) in diabetic rats. Methods: This study was composed of 24 animals, of 60 days, allocated into four groups: Control, Diabetic, Caffeine, and Diabetes+Caffeine. The Diabetes model was induced by intraperitoneal administration of 120 mg/kg of alloxan. On the test day, 6 mg/kg of caffeine were administrated 30 minutes before the exercise Stress Test (ST) protocol. During the ST animals underwent a Stress Test (ST), in which they performed forced swimming (until exhaustion) tie to loads of 13% Body’s Weight (BW). The incremental phase of LM began with an initial load of 4% Body’s Weight (BW) and increased 0.5% every 5 min. Lactate concentration was measured 5, 7 and 9 min (mmol/L) after ST. The Incremental Progressive Test (IPT) involved swimming with loads of 4.0, 4.5, 5.0, 5.5, 6.0, and 7.0% of BW, for 5min with each. Blood samples were collected by a caudal puncture to subsequent lactate and hormone assay. Results: Performance time and lactate concentration of hyperlactatemia test, as well as Lactate Minimum (LM) and Lactate (LAC) concentration after the progressive test presented a significant difference when comparing the levels of the control group with caffeine and diabetic group (p<0.05). Conclusion: It is suggested that caffeine improves lactate clearance and hormonal steady state condition of diabetic animals after hyperlactacidemia and physical exercise maintenance.
Caffeine, conditioning, hyperlactatemia, lactate, metabolism, stress test.
Post-graduation of Physical Education, Federal University of Paraná, Curitiba, Paraná, Post-graduation of Pharmaceutical Science, Midwest State University of Paraná, Guarapuava, Paraná, Post-graduation of Pharmaceutical Science, Midwest State University of Paraná, Guarapuava, Paraná, Physical Education Department, Guairacá College, Guarapuava, Paraná, Physical Education Department, Guairacá College, Guarapuava, Paraná, Physical Education Department, Guairacá College, Guarapuava, Paraná, Post-graduation of Physical Education, Federal University of Paraná, Curitiba, Paraná