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Exercise is vitally important to stimulate lymph production and movement.  Unlike blood, which flows throughout the body in a continuous loop, lymph flows in only one direction. This flow is only upward toward the neck.  The lymphatic system does not have a pump.  It relies on the movement of the muscles to promote proper upward circulation.  As it moves upward toward the neck the lymph passes through multiple lymph nodes which serve as filters to remove debris and pathogens. There are between 600-700 lymph nodes present in the human body. 

The lymph system aids the immune system in removing and destroying excess fluid, waste, debris, dead blood cells, pathogens, toxins, and cancer cells.

Wearing compression garments during exercise can also prove beneficial as they provide resistance to further stimulate lymph flow.