Efficacy of green tea extract in two exercise models

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry
• Pharmacology

Background:

• Exercise can induce physiological stress, affecting hematological parameters and antioxidant status.
• Green tea extract (GTE) contains bioactive compounds with potential ergogenic and antioxidant properties.

Purpose of the Study:

• To investigate the effects of oral green tea extract on exercise performance and hematological parameters in rats.
• To evaluate the impact of different GTE dosages and administration frequencies on endurance and physiological markers.

Main Methods:

• Rats were administered GTE orally at 6 mg/kg twice daily or 12 mg/kg once daily for two weeks.
• Exercise performance was assessed via swimming and exhaustive running tests.
• Hematological parameters including spleen weight, serum iron, reticulocytosis, and erythrocyte glutathione levels were measured.

Main Results:

• GTE at 6 mg/kg significantly increased swimming times.
• Exhaustive running led to decreased spleen weight and serum iron, with increased reticulocytosis.
• GTE at 12 mg/kg prevented the decrease in serum iron and spleen weight, and increased erythrocyte glutathione.

Conclusions:

• Green tea extract demonstrates potential ergogenic benefits, enhancing endurance performance.
• GTE may exert a normalizing effect on hemopoiesis and stimulate the antioxidant system in erythrocytes, particularly at higher doses.
• These findings suggest GTE could be a beneficial supplement for athletes or individuals undergoing strenuous physical activity.