Free radicals
Free Radicals are molecules with an unpaired electron and are important intermediates in natural processes involving cytotoxicity, control of vascular tone, and neurotransmission. Free Radicals are very unstable and react quickly with other compounds and try to capture the needed electron to gain stability. The Free Radicals formed in our body are combated by antioxidants that safely interact with free radicals and terminate the chain reaction before vital molecules are damaged. Excessive exercise has been found to increase the Free Radical level in the body and caused intense damage to the regular physical exercise enhance the antioxidant defense system and protects against exercise induced Free Radicals damage. Apart from the destructive effects of free Radical they are also responsible for some vital actions like destroy the bacteria and other cells of foreign matter, kill Cancer cells, turning on and off of genes and fight infection to keep our brain and in focus.