Study supports L-glutamine for recovery from combat-sport training

Published in theย Journal of the International Society of Sports Nutritionโ€‹, the findings showed that three weeks of supplementation improved the mucosal immunity and hormonal status of participants, along with rates of upper respiratory tract infection (URTI) and mood status after training.

โ€œMaintaining proper immune function and hormone status is important for athletes to avoid upper respiratory tract infection (URTI) and insufficient recovery, which is detrimental to sport performance and health,โ€ the researchers wrote.

They added that deficiency of L-glutamine occurs during periods of high-intensity and prolonged exercise, and that reduced glutamine levels are responsible for the immune suppression associated with increased infection rates observed in overtrained athletes.

Susceptibility to infectionโ€‹

The study noted that combat-sport athletes are particularly susceptible to infection from repeated strenuous bouts of prolonged exercise, given added stressors including the rapid weight loss required to make weight for competition and increased exposure to pathogens shared during close contact.

Previous research links immune suppression to decreased salivary immunoglobulin A (SIgA) and nitric oxide (NO), while changes in the testosterone/cortisol (T/C) ratio are associated with exercise performance.

โ€œAccordingly, athletesโ€™ hormone responses during training and competition could serve as predictors of their recovery status, leading in turn to potential improvement in performance,โ€ the researchers wrote.



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