1.过早骑童车。现在许多幼儿家长都喜欢给孩子购买各类新颖童车。虽然幼儿骑童车有一定的好处,但由于一些童车的设计不符合幼儿生理发育需要(如两脚蹬间距过宽,鞍座与踏脚距离过长或过短等),因此,很容易引起幼儿腿畸形。所以,3岁以下儿童最好不要骑童车。 2.长跑。儿童过早地从事长跑锻炼,会使心壁肌肉过早增厚,限制心腔容积的增加,影响心肺功能的发展。其次,儿童机体水分多,蛋白质和无机盐少,肌肉力量弱,参加长跑运动会造成营养入不敷出。另外,人的高矮取决于长骨细胞生长,儿童参加长跑运动,有可 1. Premature stroller ride. Now many young parents like to give their children to buy all kinds of new baby carriage. Although there are some advantages for infants riding a stroller, some strollers may easily cause young children because their design does not meet the needs of children’s physical development (for example, the distance between two feet is too wide, the distance between the saddle and the foot is too long or too short, etc.) Leg deformity. Therefore, children under 3 years old is best not to ride a stroller. 2. Long-distance running. Children engaged in long-distance premature exercise, will premature myocardial thickened wall, limiting the increase in the volume of the heart chamber, affecting the development of cardiopulmonary function. Second, children have more body water, less protein and inorganic salts, muscle strength is weak, participate in long-distance running games will result in nutritional deficits. In addition, the height of people depends on the growth of long bone cells, children participate in long-distance exercise, yes