Dumbbell exercise is carried out under the control of the central nervous system. Long term exercise dumbbell scientific system, the increased excitability of the central nervous system, inhibit the excitatory and inhibitory deepen, more concentrated, so as to improve the balance and flexibility of the neural processes, improve the cerebral cortex excitatory and inhibitory conversion ability, and enhances the body's regulatory function, activity, reaction speed and accuracy etc.. For example, we have a long time to read and study, will make people feel dizzy, concentrating, thinking slow, then as long as the dumbbell for physical activity recommended a few dumbbell or doing some day dumbbell fitness movement, and learning to read in the head, feel very awake. This is because learning to read a long time, the nerve will produce fatigue caused by a series of reactions, while participating in dumbbell fitness exercise, motor starts to work, in charge of reading learning neural rest. Therefore, dumbbell exercise plays a role in regulating the nerve to eliminate fatigue. At the same time, the dumbbell exercise in the process of conversion and relaxation during exercise improves muscle contraction ability, accelerated heartbeat, promote blood circulation, make blood volume per unit time through the brain increased, brain cells can get more oxygen and nutrients, like this, to speed up the elimination of fatigue nerves. Improve the brain's fatigue tolerance, and improve the ability of the brain for a long time to study and work. At the same time, the dumbbell exercise exercise can make brain chemicals enkaphalin and endorphin release in metabolism, to improve the comprehension ability, thinking ability and memory function, which can make quick thinking, enhance memory, imagination, the brain becomes more intelligent.