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一位搬运工人,每天坚持做广播操、打羽毛球,周围的人议论纷纷说整天活动身子,肌肉很发达,何需还要做广播操。是吗?据近代运动生理学认为:体力劳动并不能代替体育活动,其原因有以下几点:(一)从事体力劳动的人,长期重复几种固定的姿势,经常用力的肌肉群得到发展,用力小的肌肉群得不到锻炼,从全身肌群来说受到活动与锻炼的仅仅是与这些姿势有关的小范围的肌肉。大部分的肌群得不到锻炼,这就造成了职业性体型的不匀发育。严重影响健美。(二)某些劳动需要弯腰驼背,弯腰驼背久而久之影响胸肌发育,使肺活量减少,肺功能削弱使人抵抗力低下多病。另外弯腰驼背的劳动可使人的腰脊、腰肌劳损。劳动者经常出现腰
A porter, every day to do radio exercises, playing badminton, the people around have argued that all day active body, muscle is well-developed, why need to do radio operations. Is it? According to modern exercise physiology that: manual labor and can not replace physical activity for the following reasons: (a) manual labor, long-term repetition of several fixed positions, the often hard muscles to develop, hard Small groups of muscles are not exercised. Only the small range of muscles involved in these exercises are exercised and exercised by the whole body muscle. Most of the muscles can not get exercise, which resulted in the uneven development of occupational body shape. Seriously affect bodybuilding. (B) some of the work needs to hunched over, bent over the impact of long-standing pectoral muscle development, decreased lung capacity, weakening of lung function makes low resistance and sickly. In addition, hunched back labor can make people’s lumbar, lumbar muscle strain. Workers often appear waist