Exercise is an extremely important part of leading an optimized life. You must exercise both your mind and your body to reach your full potential. Through physical exercise (heavy weight resistance and high-intensity interval training) your body will cause the brain to generate new neurons through a process known as neurogenesis. However, these new neurons will not be integrated into the brain unless the brain is not carrying out something that is significantly difficult. This is why exercise also includes a mental component, because doing something challenging like learning a new language, playing an instrument, or other novel experiences, will cause the brain to integrate these new neurons and in the future make it easier to add in additional neurons.