Caffeine improves exercise recuperation by cardiovascular and biochemical response in diabetic rats
The objective of this study was to evaluate caffeine effects on cardiovascular and biochemical parameters during the recovering time of aerobic exercise in diabetic rats.
Materials and methods
24 animals of 60 days were allocated to four experimental groups: Control, Diabetic, Caffeine, and Diabetes + Caffeine. Diabetes mellitus was induced by an intraperitoneal administration of 60 mg/kg of alloxan. Once a day for 30 days, animals underwent training of forced swimming for 40 min and tied to loads of 4% of their body weight. On the 1st and 30th days of training, animals underwent a stress test, in which they performed 60 min of forced swimming with loads of 6% session of 6% of their body’s weight. Caffeine was administrated 30 min before the exercise at the test days. Cardiovascular responses such as systolic blood pressure (SBP), heart rate (HR), and double product (DP) were recorded before and after the tests. In addition, blood samples were collected for glucose, glycerol, and lactate analyses, by caudal puncture.
Glucose values were lower in rats of group caffeine + diabetes when compared to animals of other groups (25%; p < 0.05). After caffeine intake, the values of HR, SBP, and DP of diabetic groups increased when compared to control groups (32%).
The present work demonstrated that caffeine intake associated with aerobic exercise might control glucose levels in healthy and diabetic rats. Caffeine was able to reduce glycemic values, regulate cardiovascular responses, and maintain nutrients’ availability during exercise, which may improve overall fitness and tissues’ adaptation to better function.
KeywordsMetabolism Heart rate Glucose
The authors are thankful to CAPES (Brazil) and Fundação Araucaria of Paraná (Brazil) for the financial support to this study.
Compliance with ethical standards
Conflict of interest
There are no issues to disclose. There is no potential conflict of interest.
All procedures performed in studies involving animals were in accordance with the ethical standards of the institutional. All experimental procedures in this study were approved by the Institutional Ethics Committee on Animal Use (protocol no. 015/2015).
For this type of study formal consent is not required.
- 2.Anonymous (1890) Action of caffeine. Science 5:244Google Scholar
- 3.Howarth FC, Al-Ali S, Al-Sheryani S, Al-Dhaheri H, Al-Junaibi SS, Almugaddum FA et al (2007) Effects of voluntary exercise on heart function in streptozotocin (STZ)—induced diabetic rat. Int J Diabetes Metab 15:32–37Google Scholar
- 13.Scariot PP, Manchado-Gobatto FB, Torsoni AS, Dos Reis IM, Beck WR, Gobatto CA (2016) Continuous aerobic training in individualized intensity avoids spontaneous physical activity decline and improves MCT1 expression in oxidative muscle of swimming rats. Front Physiol 7:132CrossRefPubMedPubMedCentralGoogle Scholar
- 16.Silva MJ, Brodt MD, Lynch MA, McKenzie JA, Tanouye KM, Nyman JS et al (2009) Type 1 diabetes in young rats leads to progressive trabecular bone loss, cessation of cortical bone growth, and diminished whole bone strength and fatigue life. J Bone Miner Res 24:1618–1627CrossRefPubMedPubMedCentralGoogle Scholar
- 17.Polito MD, Farinatti PTV (2003) Respostas de frequência cardíaca, pressão arterial e duplo-produto ao exercício contra-resistência: uma revisão da literatura. Rev Port Cien Desp 3:79–91Google Scholar
- 20.Jae SY, Kurl S, Laukkanen JA, Zaccardi F, Choi YH, Fernhall B et al (2016) Exercise heart rate reserve and recovery as predictors of incident type 2 diabetes. Am J Med 9343:30076–30086Google Scholar