游泳运动员那宽阔的肩膀,健壮的体魄使不少青少年羡慕不已。这健美的身体不仅充满青春的活力,而且也是身体健康的标志之一。一些青少年常为自己肩胸狭窄而苦脑,其实只要你坚持不懈锻炼,你的肩膀会变得宽阔些,胸背肌肉会日趋发达起来。一、影响肩胸发达的肌肉胸廓由十二个胸椎,12对肋骨和一块胸骨组成,上肢借助锁骨及肩胛骨和胸廓连在一起。有不少肌肉附着在上面,如三角肌、胸大肌、斜方肌、背阔肌等等(图1、图2)。影响一个人肩膀的宽窄、胸脯壮实与否,主要是看这些肌肉的发达程度。二、使肌肉发达的生 Swimmers that broad shoulders, strong physique so many adolescents envy. This body is not only full of youthful vitality, but also one of the signs of good health. Some teenagers often have narrow and painful braces on their shoulders. In fact, as long as you work tirelessly, your shoulders will become wider and your chest and back muscles will develop more and more. First, the impact of chest and throat muscle thoracic by the twelve thoracic, 12 pairs of ribs and a sternum, the upper limb with clavicle and shoulder blades and thorax together. There are many muscles attached to the above, such as deltoid, pectoralis major, trapezius, latissimus dorsi, etc. (Figure 1, Figure 2). Impact on a person’s shoulder width, breast robust or not, mainly to see the development of these muscles. Second, the muscular students