一、劳逸必需结合在生产劳劲中,合理的安排劳动和休息,是增强体质,保持充沛精力,降低病伤缺勤率,提高生产率的重要措施。人和机器不同,机器愈用愈损,而人体是有很高的适应能力的,只要劳动合乎生理卫生的原则,无论是脑力或体力劳动都是愈劳动其能力愈强。如在劳动中肌肉能得到更充分的血液供给,收缩力量增强,收缩速度提高,弹性、延展性以及和他相连的关节、韧带的机能都能得到改进。劳动时心脏血管系统的毛细血管数量和面积增加,心室壁肌肉增厚,收缩力加强,循环系统的功能得到了改进。经过劳动的锻炼,呼吸系统和神经系统的功能大大加强。肺活量增加,呼吸次数减少,深度加深;大脑皮质对动作的控制日趋完善,动作逐渐准确和协调,因而提高了工作效率。事实也证明,好逸恶劳的人,身体衰弱, First, work and rest must be combined with productive labor. Reasonable arrangements for labor and rest are important measures to enhance physical fitness, maintain sufficient energy, reduce the absenteeism rate and increase productivity. Different people and machines, the more the more damage the machine, and the human body has a high adaptability, as long as the principle of physical and mental health, whether it is mental or physical labor are more capable of their work more. As labor in the muscles can get a more adequate blood supply, increased contractility, increased contraction rate, elasticity, ductility, and connected to his joints, ligaments function can be improved. During labor, the number and area of ​​capillaries of the cardiovascular system increase, the thickening of the ventricular wall muscles, the strengthening of the contractile force, and the improvement of the circulatory system function. After workouts, the respiratory and nervous system functions greatly enhanced. Increased vital capacity, decreased respiratory rate, deepened; the control of the cerebral cortex increasingly perfect action, gradually accurate and coordinated movements, thereby increasing work efficiency. The facts also prove that those who are indolent and debilitated, who are weak,