Comparison of physiological and biochemical changes in old and young hyperglycemic rats submitted to aerobic exercise...

Prolonged hyperglycemia conditions are a risk factor for chronic degenerative diseases such as diabetes and obesity. Testosterone is known to cause muscle hypertrophy, reduced fat mass, and increased body strength. The study aimed to verify possible alterations and differences in the influence of testosterone on the physical performance in post-exercise conditions of young and old animals with alloxan-induced hyperglycemia. We randomly assigned 32 young Wistar rats to groups of untreated non-diabetic young, treated non-diabetic young, untreated diabetic young, and treated diabetic young rats, and 32 aged Wistar rats to groups of untreated non-diabetic elderly, treated non-diabetic elderly, untreated diabetic elderly, and treated diabetic elderly rats, with eight animals each group. The treated non-diabetic and treated diabetic groups received injections of 15 ​mg/kg weight Durateston™. All the trained groups performed aquatic training with an overload of 5% of the body mass. Following the experiment, we anesthetized and euthanized the animals after exercise (exhaustion). Hemoglobin, erythrocytes, and hematocrit values were higher in the treated groups. The treated diabetic elderly group had the highest leukocyte and neutrophil counts compared to the untreated young groups (p ​< ​0.05). As for the lipid profile, untreated rats had the highest values. Glucose concentration was higher at rest and after exercise in the untreated diabetic groups (p ​< ​0.05). Lactate was more elevated in the untreated diabetic groups, and the testosterone-treated groups performed the longest swimming time after the maximal test (p ​< ​0.05). The use of testosterone in conjunction with physical exercise improved physical performance in water, blood glucose, and lipid profiles.