Scientists have proved that physical activity are useful for human health.Also the exercise allow to keep your body in shape, increase people*s endurance in different situations.Regular exercise - is not only a guaranteed weight loss, slim and trim figure, but also the extension of youthful skin.Every day, the human body is faced with countless toxins: pollution, chemicals in air and water, and so on. Physical activity improves the body's ability to cope with these "unwanted guests" and eliminate toxins.If we compare the active and inactive people who are tired quickly? Of course the laziest. So, if you feel the lethargy, weakness, quickly get tired you need to become more active.Exercise - a universal stimulator and a reducing physical and mental performance.Even if you are very tired and literally valites feet, do not rush to sit or lie down. Active rest will recuperate much faster, but his choice of forms and methods should be approached separately, taking into account the individual combination of the four basic signs of fatigue: the fall of attention, loss of interest in work, drowsiness, overstimulation.Fatigue - is a human condition caused by work. Physical fatigue contribute to dynamic loads - long walking, running and static load - lifting weights, their retention, transfer, and others. Mental fatigue is caused by an overload of the senses (sight, hearing, touch), a strong focus voltage, responsible, emotional work.Based on the foregoing, I agree with the statement of Plato, and I encourage everyone to engage in physical exercise, at least sometimes.