Antioxidants and immune function. Physical activity stimulates the body to spend energy on repair and maintenance systems to mop up the damage that exercise might cause in the first place. One of these investments is antioxidant production. These cleanup molecules counteract highly reactive atoms that cause many kinds of damage including potentially cancerous mutations.100 In addition, non-extreme levels of exercise boost the immune system, which plays a vital role in fighting cancer. An especially promising discovery is that vigorous exercise potently enhances the effectiveness of natural
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