Hard exercise can also compromise the immune system making athletes more susceptible to colds and infection. The natural herb, ciwujia as well as the amino acid, glutamine, have both have been shown to stimulate the immune system. Rebuild Muscle Protein Repair of damaged muscle proteins begins immediately after exercise. Insulin stimulates muscle repair by increasing amino acid transport into the muscle. Protein is one of the most widely discussed nutrients in the sports world.
Most athletes get enough protein in their diet.
However athletes who undergo heavy physical training should take extra protein to help offset tissue damage. Sufficient amounts of branched-chain amino acids are found in any quality whey protein supplement. Glutamine may be the most important amino acid in the recovery process. Glutamine stimulates muscle protein synthesis and preserves skeletal muscle mass. There is good evidence that supplementing the diet with additional amounts of glutamine can enhance muscle performance.