Study On The Level Of Physical Activity Of Underground Workers And Its Relationship With Body Composition And Bone Mineral Density

Research objectives: The studies include the labor intensity of coal miners,the proportion of occupational physical activities in total physical activities,the proportion of body composition of special occupational workers,the occurrence rate of obesity and obesity-related diseases,bone conditions in special circumstances.The studies are aimed at giving reference data for the nation to establish labor protection system.Results:1 Among the average of the age peers,the physical-activity level of staff at Zhongtiaoshan Nonferrous Metal Co.is higher,and people working underground have higher level of physical activities than people working in office.That is to say that people working underground are hard physical labor.There is no significant difference in physical activity among the age groups of underground workers.2.There are significant differences in the body composition between workers in office and underground workers whose body composition is better(P <0.05).There are significant differences in the body composition among different age groups of the underground workers.And the difference is farther with age.3.The bone mineral density of workers at Zhongtiaoshan Nonferrous Metal Company is lower than that of the ordinary people in China,but there is no significant difference in BMD between underground workers and Inoue workers(P> 0.05).There’s little difference in bone mineral density among different age groups(P> 0.05).Methods: 1 Acording to articles,the relationship between the body composition and the bone mineral density is studied.2 Through the questionnaire survey,the physical activity level and the diet are obtained.3.The bone density,body composition and physical activity of the subjects were measured with the Sunlight BMD,the Body composition and the tri-axial force transducer.The results were analyzed by single factor analysis of variance(ANOVA),and the relationship between physical activity level,bone mineral density and body composition was analyzed.Conclusion: 1.The level of professional physical activity of underground workers is still very high,and the level of mechanization is to be improved,meanwhile the labor load of the workers should be reduced.2.Physical activities are a major factor affecting body composition and bone density.Maintaining moderate intensity of physical activity not only makes the body healthier,but also increases bone density and slows its loss.3.Reasonable diet is also an important factor affecting body composition and bone mineral density.The underground workers whose body composition are abnormal can control the energy intake,while low bone mineral density workers can increase the calcium intake.