体力活动是指由于骨骼肌收缩导致的明显能量消耗增加的各种身体活动,包括职业性体力活动、与交通有关的体力活动、家务劳动及闲暇时间的体力活动随着科学技术的发展,新技术、新设备的应用,机动车辆使用的增加和家务劳动的减少,职业性体力活动 Physical activity refers to a variety of physical activities that increase apparent energy expenditure due to skeletal muscle contraction, including occupational physical activity, physical activity related to transportation, housework, and physical activity during leisure time. With the development of science and technology, new technologies , the application of new equipment, the increase in the use of motor vehicles and the reduction of domestic work, occupational physical activity