text: Doctors have done research to find what being in a physical activity, like a sport, can do to improve a person's health. They found that being physically active releases a chemical in the brain, that puts a person in a better mood. So not only will students be staying active, their mental state might be better than not doing an extracurricular activity. From experience, I know that when I'm at swim practice, it takes my mind off of everything else going on in my life. It tremendously relieves my stress, at least for the period of time that I'm at practice. If a student were to sign up for a club related to science, that would also exercise their mind or expand their knowledge, which could be useful for future jobs.