Exercise may change the brain to a certain extent, mainly in terms of improving cognitive ability, slowing down brain aging, and enhancing memory. 1. Improve cognitive ability: Exercise can make the brain produce neurotransmitters, and also make the body produce serotonin, norepinephrine, dopamine three kinds of substances, which can be very good at calming the brain and reducing attention deficit, thus improving cognitive ability. 2. Slow down brain aging: exercise can increase brain synthesis of BDNF protein, can establish and maintain the circuit between nerve cells, delay brain aging, but also can stimulate neurons to newborn more synapses and dendrites, so that the brain passes information more efficiently. 3. Enhance memory: exercise can affect the volume of the hippocampal gyrus, the longer the exercise time, the larger the volume of the hippocampal gyrus will be, thus improving memory. Adherence to exercise has more benefits for the brain, but should pay attention to the frequency and time of exercise, do not overdo it, and exercise can not replace the relevant treatment, should be rational to look at the changes in the brain of exercise.