儿童少年的年龄划分—般是指6～17岁的儿童少年。他们正处于生长发育旺盛时期,与成人相比较,其各器官、系统的形态和功能都有其明显的特点,身体形态结构和生理机能尚未成熟,特别是青春期,身体变化很大,合理地进行体育锻炼,能促进身体发育。增强体质,提高健康水平。不合理的体育运动妨碍身心健康。同时, The age of children and adolescents - generally refers to children aged 6 to 17 years. They are in a period of vigorous growth and development. Compared with adults, their organs and systems have their distinct features and functions. Their physical structure and physiological functions are not yet mature, especially in adolescence. Their physical changes are very large and rational. Physical exercise, can promote physical development. Enhance physical fitness and improve health. Unreasonable physical activity hinders physical and mental health. Simultaneously,