First of all, teenagers have more cartilage components than adults, more water and collagen, less inorganic salts and poor bone density, so teenagers' bones are slightly weak in elasticity and easy to bend and deform. Therefore, it is necessary to develop correct posture and body posture during exercise. Pay attention to the weight of the load when carrying out strength training.
Secondly, teenagers have more water, less protein, fat and inorganic salts, so their muscle contraction function is poor, their endurance is poor, and they are prone to fatigue. Therefore, we should pay attention to the load and the number of groups during exercise, and also pay attention to comprehensive physical training. It is suggested to use limb stretching exercises and suspension exercises, do more jumping and self-weight strength exercises, and do less weight-bearing exercises.
Therefore, during the period from 10 to 13, it is very beneficial to the growth and development of teenagers to adopt reasonable methods for strength training, which is mainly reflected in three aspects: the first is to promote height development. It is pointed out that 90% of the strength training children aged 12- 14 catch up with or surpass their father's height at the age of 17. Strength training can promote the thickening of bone density and improve the firmness of bone.
Finally, proper and scientific fitness can improve the cardiovascular and respiratory functions of teenagers. The test of teenagers aged 13- 16 shows that the heart rate of children who have received strength training at the age of 14 is 70 beats/min at rest, which is lower than that of non-athletes. Slow heart rate is the embodiment of enhanced heart function, and vital capacity has also been significantly improved.