Physical exercise is any bodily movement repeated and intended to retain or regain health. It is also often directed toward improvement of athletic ability and / or skill. The frequent and regular physical exercise is a necessary component in the prevention of diseases such as heart disease, cardiovascular disease, type 2 diabetes mellitus, overweight, back pain, among others.

Exercise should be done sparingly and in a balanced manner, with attention to internal physical changes learn to understand the cause-effect relationship between the actual physical movement and its direct impact with the perceived internal changes.

Excessive physical exercise is not recommended because it can lead to physical wear of certain parts of the body. Then, it can insist on the balance of forces, both internal and external, and it helps the self through a critical self-examination (breast self awareness while developing physical activity).

Exercise is necessary for a balanced health and must also be complemented with a balanced diet and adequate quality of life. (Ortega, G. 2007, pps). Its benefits can be summarized in the following points:

* Increases vitality, thus providing more energy and work capacity.
* Assists in combating stress, anxiety and depression.
* Increased self-esteem and self-image.
* Improved muscle tone and fatigue.
* Facilitates relaxation and reduces tension.
* Burns calories, helping to lose excess weight or maintain your ideal weight.
* Help you to sleep.
* Promotes coexistence among friends and family, as well as giving opportunity to meet people.
* Reduce violence in very temperamental.
Favours lifestyles without snuff, alcohol and drugs.
* Improved sexual response.
* Reduces feelings of isolation and loneliness among the elderly.
* Strengthens the lungs and thereby improving the circulation of oxygen in the blood.
* Lowers cholesterol and risk of stroke, and regulates blood pressure.
* It is effective in treating depression.
* Stimulates the release of endorphins, the so-called "hormone of happiness."
* Allows for momentary distraction concerns with what you get calm and clarity to deal with them later. [2]

The minimum amount to prevent disease is 30 minutes of moderate physical activity. Other habits that must be combined with the completion of exercise are good nutrition, adequate rest, hygiene and avoid the consumption of substances harmful to the body, such as snuff, alcohol and other stimulants.