ABSTRACT
In our country, there are two hundred and ten million children and teenagers, and adolescents’ growth level and athletic ability is not only a reflection of national physique condition of students and their comprehensive national strength but also an important symbol of a nation’s prosperity. In childhood, muscle percentage is low, muscle protein is less, muscle fiber is relatively thin, and motion system development is not perfect. In the teenager, the function of sports system had the preliminary development mainly displayed in the muscles of the percentage of weight gain, muscle fiber cross-section increases, increased calcification of bone and bone enlargement, the contraction of muscle force, and robustness enhancement of bone and joint. Therefore, it has been basically studied; however, at this time, the condition of complex technical action is good period of development of strength and speed (Xu 2006). During the teenage years, their bodies grow rapidly and are in a critical stage of shape and posture. Because of the burdensome curriculum and the lack of enough attention of parents to students’ exercise, this leads to many teenagers lacking exercise. Because of the effect of the poor posture of daily sitting, standing, or walking and bad habits, the body posture of the teenagers tends to sag, with a bent vertebral column, height and low shoulder, and screwed
legs, which affects their external beauty. We could either avoid these problems or correct them through timely prevention and treatment. Corresponding covering strength training, improving the muscle strength training, which takes the spine as the core, and strengthening the strength on their ligaments play a critical role in the aspect of the posture and gesture for teenagers. In this article, we learned the difference between strength and explosive force in various phases of age of the teenagers. This is available for drafting the exercise programs for the teenagers at the corresponding age. It can also help the teenagers form good posture and gestures by combining with development rule of the body (Anthony et al. 2002).
