Systematic Review And Meta Analysis:The Impact Of Physical Exercise On Bone Mineral Density Of Middle School Students And Its Teaching Implications

The development of bones is an important factor affecting the height and physical health of middle school students.In recent years,under the guidance of a series of policies and regulations issued by national functional departments and education administrative departments,as well as the joint efforts of society,schools,and families,the declining trend of students’ physical fitness has been curbed.According to the results of the 8th National Survey on Students’ Physical Fitness and Health,the overall excellent rate of students’ physical fitness and health standards in China is on the rise compared to before,but the excellent rate of the 13-22 age group is only 17.7%,It can be seen that the issue of students’ physical health is still very prominent.The development of bones is closely related to learning and life in middle school,and will have a profound impact on physical fitness,health level,and work ability in adulthood.This research combs the previous research results of the impact of physical exercise on the bone density of middle school students at home and abroad,and then quantitatively evaluates the effect size of the impact of physical exercise on the bone density of middle school students.Finally,the research results and conclusions will be used to guide the physical education teaching of middle school students,and put forward relevant suggestions for middle school students to participate in physical exercise,with a view to providing suggestions for improving the bone development of middle school students.Through searching,analyzing and screening the literature in the relevant database,the author finally took 12 articles related to the impact of physical exercise on the bone density of middle school students as the analysis text,and used the literature method,visual analysis method,Meta analysis method and comparative analysis method to analyze the impact of physical exercise on the bone density of middle school students in the whole body,lumbar spine and neck of femur,And the following conclusions are drawn:(1)There are differences in the impact of different physical exercise programs on the overall bone mineral density of middle school students.Participating in sports such as swimming,basketball,and football can significantly improve the overall bone mineral density of middle school students;When the opposite sport is judo,there is no statistically significant impact of physical exercise on the overall bone density of middle school students;(2)By analyzing the impact of specific areas on bone density,it was found that physical exercise can effectively improve the lumbar spine bone density of middle school students.Subgroup analysis found that the impact of physical exercise on lumbar spine bone density of middle school students is somewhat correlated with gender,and the effect of physical exercise on boys is more significant than girls.According to the meta-analysis results,it was found that literature produced before 2010 and from 2016 to 2020 showed that physical exercise can significantly improve the lumbar bone density of middle school students.During the period from 2011 to 2015,the statistical test of the impact of physical exercise on lumbar bone density of middle school students was at the critical point of significance(P=0.05);(3)Physical exercise can effectively improve the bone mineral density of middle school students’ neck of femur.The improvement effect of neck of femur bone mineral density of middle school students who participate in football sports(P<0.0001)is more statistically significant than that of students who participate in swimming sports(P=0.03).Based on the above analysis,relevant insights can be drawn:(1)Physical education teachers should clarify the key points for developing the physical and mental qualities of middle school students through physical education textbooks;(2)Fully utilize the advantages of physical education module teaching to improve middle school students’ bone density;(3)Efforts should be made to explore sports intervention channels for improving middle school students’ bone density beyond physical education classroom teaching in schools;(4)Targeted selection of physical exercise programs and reasonable arrangement of exercise intensity and time;(5)Strengthen the understanding and understanding of physical exercise and bone health related knowledge among teachers and students.