PHYSICAL EXERCISE

            Physical exercise is an activity that a person does to improve or maintain physical fitness. Physical exercise is generally grouped into several categories, depending on its effects on the human body. Flexibility exercises such as stretch improve the range of motion of muscles and joints. Aerobic exercise such as walking and running focus on the addition of cardiovascular endurance. Anaerobic exercises such as weightlifting to add short-term muscle strength. Exercise can be an important part of physical therapy, weight loss or exercise ability. Physical exercise frequently and regularly improve the performance of the immune system, and helps prevent heart disease such wealth, cardiovascular disease, type 2 diabetes and obesity.

HISTORY OF PHYSICAL
Advantages history of physical exercise has been known since ancient times. Marcus Cicero in 65 BC, stated: "Exercise alone helps the soul and mind remain viable keep thinking". Physical exercise and brain function in the long term, physical exercise is useful for the brain to: add to the flow of blood and oxygen to the brain adding growth factors that help create nerve cells a new and improve plasticity of synapses add chemicals in the brain that help cognition, such as dopamine, glutamate , norepinephrine, and serotonin