One of the most rapidly developing body systems in adolescents - a cardiovascular. In the period from 10 to 16 years of heart weight doubled, and the amount of - 2.4.
The myocardium (heart muscle) becomes stronger and begins to discharge into the vessels more blood while reducing, respectively heart rate decreases in adolescents and by age 18 becomes the same as that of adults.
But the problem is that the development of the cardiovascular system can not keep up with the overall pace of development of the rapidly growing body and heart weight increases slower body weight. In such cases, teens may complain of fatigue during physical exertion, fatigue, tendency to fainting.
Often in such cases, the parents, worrying about the health of adolescents, trying to protect them from physical activity, in order to "keep the heart." Here it only leads to undesirable results. In order to "synchronize" the general development and the development of the cardiovascular system, and just need systematic feasible exercise. If a teen will no longer play sports, heart problems may be exacerbated.
Lack of exercise negatively affect the health of adolescents. Unfortunately, the typical teenager spends most of the day in a state of immobility (full or relative) because of the high stress at school. But for the normal development of the young person requires not only mental but also physical load, and even school physical education classes are usually unable to compensate for the lack of physical activity.
