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“As explained in the first chapter, human beings are physically hardwired to constantly move about and exercise. Every day, we build up a lot of stress, and physical exercise provides an outlet to get this out of our system so we can stay healthy. In the modern world, our stress is exacerbated by our incessant consumption of negative news and by rapid changes in our culture and norms. Negativity and confusion add stress to the body. Exercise will help manage this by releasing neurotransmitters, called endorphins, into our body to manage our response. Exercise temporarily mimics the fight-or-flight response that you may feel when you are stressed. But in the long run, it will help calm and de-stress you. Endorphins help calm your responses and ultimately result in removing the built-up stresses from our lives. Studies have shown that people experience positive changes after just one or two cardio sessions. Exercise will also help you sleep, which is directly correlated with lower stress and anxiety.3 Exercise”
― Paul Uponi, Muscular Christianity: A Case for Spiritual and Physical Fitness