The article is to discuss free radical from the health and physical education point of view and find out some useful ways to be against free radical. There are so many kinds free radical in our body. They are so important and can be organized by themselves or come form outer surroundings. Free radical is with one single antielectron which contains atom or element and produces in any part of our body. Some free radical is animate and easy to rob or assail other material. Free radical sometimes robs or assails other material, and even attack our health resulting in serious reflection. Free radical may cause diseases or be harmful to our body. Therefore, eliminating some harmful free radical is good to our health. But acrimonious exercise can result in accumulating harmful free radical. So, ingesting aneurin E and aneurin C can prevent or dampen the damage resulting from harmful free radical.