Exercise has many benefits to your overall well-being, but according to this article it can also protect your brain against depression.This is particularly important in preparation fitness because both your body and mind have to be ready to endure a lot of stress during an emergency. Having the mental strength to overcome adversity, coupled with a will to survive is a critical tool to have. Being fit makes this more achievable and increases your likelihood of survival during stressful times. So take fitness seriously, your brain needs you to be fit!