summary ofSparkBook by John J. Ratey, MD

first KEY POINT

Brains and brawn, or why breaking a sweat is beneficial for good health

Nowadays, the convenience of technology often promotes a sedentary lifestyle, which contradicts our natural need for movement and physical activity. Our modern home-sitting lifestyle threatens our health and shortens our lives. What’s more, inactivity negatively affects the human brain, reducing its capacity for intellectual work.We should always remember that our bodies and minds are on the same team. Factors beneficial to one invariably enhance the other, yet regrettably, elements detrimental to one likewise harm the other. Hence, physical exercises enhance brain development and foster improved focus, thereby augmenting our ability to retain information.

The brain primarily uses two neurotransmitters — glutamate and gamma-aminobutyric acid (GABA) — to memorize or forget anything read or heard. Glutamate transmits these information signals between neurons, making them connect and build a new “unit.”Serotonin, another neurotransmitter, controls brain activity and influences mood, earning it the nickname of the happiness hormone. People diagnosed with depression usually take Prozac, which regulates serotonin secretion and improves moods. Dopamine, another crucial hormone, is responsible for our learning and attention. Those with attention deficit hyperactivity disorder (ADHD) may take medication to boost dopamine production and calm their minds.However, people without psychological disorders can enhance attentiveness and learning ability without medication. Regular jogging or exercising increases the secretion of these neurotransmitters, explaining why we often feel better after a workout.In this summary, you will find the motivation to do sports and understand why you need it. By doing that, you’ll become healthier overall.