Exercise helps develop fitness and strengthens the immune system. However, those who intend to build their bodies for physique competitions or sports train very hard.

Such intense training may tax the immune system, especially when athletes follow goal-specific diet plans. Intense training depletes the body of conditionally essential amino acids such as glutamine and arginine. Researchers from Rouen University Medical School have found out that adding food supplements such as glutamine and arginine to critically-ill persons was of great benefit in improving health. Both these amino acids increased absorption of nutrients from the gut and decreased inflammation and undesirable effects of free radicals.

Adding such amino acids to the diet plans of sportsmen is now being recommended by many experts.