Many people have a weakened immune system and may not even realize it as symptoms are manifested through a number of other channels. Poor diets and stressful lifestyles are two key components of a weakened immune system. The reasoning lies in a quick run through of your nervous system:
The nervous system is made up of two "sub-systems" that run simultaneously: sympathetic nervous system and parasympathetic nervous system. The sympathetic nervous system is tuned to react to stressful situations and result in a "fight or flight" response by the body. This is a normal reaction to high-stress situations and is intended as a short-term response. The parasympathetic nervous system repairs, regenerates, and heals various body parts and systems when we are in a restful state.
Problems arise when the sympathetic system dominates the parasympathetic, robbing our bodies of the essential period of regeneration necessary for proper overall function -- the parasympathetic system never becomes fully activated. During sympathetic domination, adrenaline levels and many other stress-related hormones become depleted. The body is in a constant state of tension and your lymphatic system cannot properly eliminate toxins. This situation generally depletes and strains the body and your immune system must bear the brunt and becomes compromised as a result.
If you are a high performance athlete, it is important to watch your amino acid levels. Studies have found that after those who undergo an intense exercise period often have a higher incidence of infection and cold symptoms due to a weakened immune system.
A University of Oxford study found that post-marathon endurance athletes experience a decrease in plasma levels of glutamine coupled with a drop in the number of immune system lymphocytes -- cells dependent on glutamine for optimal growth. This drop in lymphocyte count, along with other negative changes in the immune system, is considered to be the cause of a higher level of illness among athletes. Glutamine supplementation can alleviate this situation, particularly when the amino acid is taken intravenously. It is highly recommended to consult with your fitness consultant, naturopath or other health practitioner before undertaking this approach.
